• home cd ~
      • MFS: Using a RAM Filesystem
      • Mounting a Filesystem in Multiple Places Simultaneously
      • Activating the Serial Port on FreeBSD
      • Activating Kernel Modules
      • Modifying Your Generic Kernel
        • Installing FreeBSD on ZFS
        • Monitoring CPU Temperature on FreeBSD
        • Creating an Apple Time Machine Network on FreeBSD
        • Modifying Boot Parameters
        • OpenBSD Configuration Guide (Very Complete)
        • Recovering your OpenBSD after a bad manipulation
        • OpenBSD Package System
      • Migration: Migrating Linux accounts to BSD
        • IP Filter: Using the Firewall on Solaris
      • Configure Network on NetBSD
      • Configuring Network on FreeBSD
      • UFS: Disk usage in UFS
      • VLAN: Creating a VLAN Interface on OpenBSD
      • Configure Network on OpenBSD
      • Trunking: Creating Trunking (bonding) on OpenBSD
      • Bandwidth Usage Statistics
      • QoS (Quality Of Service) with PF
      • FreeBSD Package System
      • Encrypting Swap Partition
      • Jailctl: Creating Chroot Environments (Jails)
      • Introduction to C
      • Some examples of CMake usage
      • Better Understanding and Using the C Language Preprocessor
      • Introduction to XHTML
      • CSS: Style Sheets
      • Special Characters
      • Text Formatting
      • Java Memory Management
      • Debugging a JVM Crash
      • Introduction to PowerShell
      • Introduction to Perl
      • Object-Oriented Programming in Perl
      • My Perl Scripts That Can Serve as Exercises
      • Learning Perl 6
      • Compile Your PHP Scripts
      • Introduction to PHP
      • Securing PHP Scripts
      • My Python Scripts That Can Serve as Exercises
      • Introduction to Python
      • Introduction to Shell Scripting
      • Different Shell Script Loops
      • Debugging a Shell Script
      • Introduction to SQL
      • SQL Injections
      • Address Space Protection: State of the Art in Linux and OpenBSD
      • Penetration Testing
      • Grimwepa: Easy WiFi Hacking
      • Hidden (or Covert) Channels
      • PSAD: Protection Against nmap-Type Scans
      • Scapy: Data Frames and Packets
      • Man in the Middle
      • Reverse Engineering with LD_PRELOAD
      • ARP Spoofing in a Switched Network
      • Altering ARP Tables
        • Anti-forensics on ext2/ext3 Filesystems
        • Finding passwords from the Windows SAM database
        • Arbitrary Code Injection and Execution in Another Process Memory Space
        • Shatter Attack Technique
        • Fuzzing - Tutorial on Using and Customizing a Fuzzer for Vulnerability Research
        • Download and Execute ShellCode: Optimized and Detailed Code of a Download/Execute ShellCode for Windows
        • Finding the base address of kernel32.dll: Three methods PEB, SEH and TopStack
      • DNS Protocol Security Audits
      • Cryptology and Prime Numbers: The RSA Algorithm
        • OpenSSH FAQ
        • Belier: Script Your SSH Connection
        • Bypassing HTTPS Proxies for SSH
        • Reverse Tunneling with OpenSSH
        • Creating a VPN with OpenSSH
        • Chroot SSH Accounts
        • Setting up an SSH Bouncer Server for Your SSH Connections
        • Securing OpenSSH
        • Fanout: Run the Same Command on Multiple Machines Simultaneously
        • Sed & Awk: Some Examples of These Wonders
        • Jobs: How to Use Jobs
        • Cpulimit: Limit CPU Usage
        • Tmux: The Terminal Multiplexer Replacing Screen
        • Screen: Most Used Commands
        • Redirect a Service Output to a File
        • The find command or the power of search
        • Execute Commands at Logout
        • ZSH: A Very Practical Shell
        • Date: Advanced Usage of the Date Command
        • Finding Broken Symbolic Links
        • Removing Superfluous Elements in Text Files
        • Batch Renaming Elements
        • Most Used Commands List
        • Chat with Users on the Same Machine via Terminal
        • Find all dependencies related to a package
        • Locate Large Files and Directories
        • Pstree: List Processes as a Tree
        • How to Kill a Crashed Application or Handle a Frozen Screen
        • Unix Toolbox: All Useful Commands
        • Differences between du and df
        • Command-line Burning
        • MOTD: Modifying the Console Opening Message
        • Xterm: Customizing the Display
        • Fifo and Cat: Share a Session with Multiple Users
        • Kill and lsof: Killing the process listening on a specific port
        • Ivconv: Text Transcoding to Any Character Set
        • Environment Variables
        • Console Colorization
        • Sipcalc: Subnet Calculator
        • Shell: Batch Renaming with Counter
        • Vim: Essential Commands & Quick Reference Card
        • Vim: Essential Commands and Quick Reference Card
        • Introduction to Vi
        • Emacs: Quick Reference Card
      • Yubikey: Configure Your Yubikey with PAM
      • MFi: Install a Ubiquiti server to manage powerstrips
      • ZNC: Use a Bouncer to Get History
      • CPUBurn: Stress Testing Your CPU
      • Weechat: A User Friendly IRC Client
      • Gnuplot: Graph Data Easily
      • Crontab: Usage
      • Task Scheduling
      • Mirroring a Website
      • BusyBox: Creation and Usage of a BusyBox
      • FTP: Automate Transfers
      • Linux-Unix Cheat Sheets - The Ultimate Collection
      • Restarting difficult services
      • Patches: Creating and Applying Patches
      • Strace and Ltrace: Trace System and Library Calls
      • Perl Locale Issues
      • Generate a Configure File for Pre-make
      • Failed Compilations
        • Vino: The VNC Server of Excellence for GNOME
        • VNC: Listen Mode on Linux
      • Infinality fonts for retina display
      • How to install and configure a monitoring machine for supervision
      • Awesome: A Lightweight and Powerful Desktop
      • Synergy: Multi-screen Setup with Multiple Computers
      • GNOME Shell: Using Settings to Configure Your Desktop
      • Gnome-shell: Automatic Wallpaper Change
      • Zenity: GUI for Your Scripts Easily
      • Disable Sound in GDM
      • Gnome: Locked Dashboards
      • Xmodmap: Map All Your Mouse Buttons
      • Disable the PC Speaker Beep
      • Restart X
      • Using the Numeric Keypad as a Mouse with X
      • Wacom: Setting up the Wacom Bamboo
      • Export a Display or Forward an X11 Connection
      • Numlockx: Enabling the numeric keypad at boot
      • Fluxbox: Rounded Corners for All Windows
      • Compiz: Setting Up a 3D Desktop
        • Resize Swap
        • Software RAID Configuration
        • Optimization of extX filesystems and RAID under Linux
        • Linux RAID Performance
        • Recovering Data from a RAID1 LVM
        • LUKS: Encrypting Your Partitions
        • EncFS: Setting up EncFS with FUSE
        • Solutions for Encrypted LVM System
        • Cryptoloop: Setting Up an Encrypted Folder
        • TrueCrypt: Portable Data Encryption
      • LVM: Working with Logical Volume Management
      • Optimizing Hard Disk Performance on Linux
      • Foremost: Recover Deleted Data
      • Clone a Hard Drive
      • ACL: Implementing NT-type Permissions on Linux
      • AutoSSH: Automatically Reconnect SSH Tunnels
      • Parted: Solving Partitioning Problems on Large Filesystems
      • BTRFS: Using the Ext4 Replacement
      • Tmpfs: RAM filesystem or how to write to RAM
      • ZFS On Linux: Setting up ZFS on Linux
      • Smartmontools: Hard Drive Monitoring
      • Scalpel: Recovering Deleted Data
      • Limiting I/O usage by an application
      • SWAP: Creating Dynamic Swap
      • Filesystem Conversion
      • No space left on device while there is space available
      • Incron: Execute Automatic Actions When File States Change
      • Setting up quotas on Linux
      • Anatomy of a Linux Filesystem
      • AutoFsck: Changing Filesystem Checks on Ubuntu
      • TestDisk: Recovering Lost Data
      • Creating Blank Images for Testing Filesystems
      • Ext3: Resize partitions without data loss
      • Hdparm: Optimizing Disk Access
      • FUSE: Unable to Mount Disks Due to /dev/fuse
      • Recompile your kernel
      • Process Latency and Kernel Timing
      • Queueing Theory
      • Linux Memory Management
      • Memory Caches
      • Memory Addressing and Allocation
      • Linux Process and Scheduler Management
      • Udev: Using a Socket to Communicate with Kernel Devices
      • Kexec: Optimize Your Boot Times
      • Sysctl: Configuring Kernel Options in Linux
      • SystemTap: Profile and Quickly Use Kernel Features
      • OProfile: Profile Your System
      • Securing Your Kernel with Grsecurity and PaX
      • Managing Zombie Processes in Linux
      • Understanding the Content of /proc
      • Strengthening Linux Kernel Security Functions
      • Initramfs: Fixing Kernel Boot Issues with Initramfs
      • Modifying Source Version
      • How to Check the Page Size of Your Machine
      • Kernel: Module Compilation
        • Cron-apt: Automatic Security Updates Installation
        • How to use old Debian repository for unmaintained Debian versions
        • Integrit: Add an integrity control tool on your Debian
        • Automate Debian Installation
        • Debian: Reinstalling a Server Almost Identically
        • Checking File Integrity on Debian
        • Installing Debian on a Mac in Single Boot
        • Recompile a Software the Debian Way
        • Advanced Usage of Debian Packages
        • Modifying CPU Frequency
        • Broadcom Drivers and Debian
        • Creating a Debian Repository
        • Debian: Changing Default Tools (e.g., Editor)
        • Debian: No More Dependency Errors When Configuring From Source
        • Debian: GPG Error During apt-get update
        • SoSReport: Generate and analyze machine reports
        • Creating a RedHat Package from a Tar File
        • Creating a Red Hat Kickstart to Automate Installations
        • Yum: Package Management in Red Hat
        • Restore permissions on Red Hat
        • RPM: Build a Binary RPM Package from Sources on Red Hat
        • Creating a RedHat DVD from CDs
      • Systemd: How to Debug on Boot Failure
      • Vagrant: Quickly Deploy Virtual Machines
      • Sysstat: Essential Tools for Analyzing Performance Issues
      • Activating the Serial Port on Linux
      • GRUB: Using a Bootloader
      • Connect to Debian via Serial Port
      • Disable Screen Standby on Debian
      • DrawIt: A VIM Extension for Creating ASCII Diagrams
      • Converting Unix Timestamp to Date
      • GS: Merge Multiple PDFs Into One
      • Measuring Execution Time of One or Multiple Commands
      • Sending Emails from Command Line
      • Sudo: Running commands as root without being root
      • Manipulating Images via Command Line
      • Getting Hardware Information from a Machine
      • Linux: Launching Daemons at Boot
      • IRC: Setting up an IRC server with UnrealIRCD and Anope Services
      • Understanding Time Management in Linux
      • VirtualBox: VMware Alternative
      • Understanding Load Average
      • Installing Mac OS X and Ubuntu in Dual Boot
      • Linux Boot Process
      • Replacing an installed RedHat with Debian without formatting
      • Enabling and Disabling Screen Savers from Command Line
      • Wine: Running Windows Applications on Linux
      • Activating the Numeric Keypad
      • How to Check BIOS Version Without Rebooting
      • Creating an ISO Image
      • Gentoo: Using Portage
      • Gentoo: Getting Started
      • RAM Information
      • Uncompress for Different Formats
      • SABnzbd: A Web Interface for Managing Newsgroups
      • Switch audio output to another USB device
      • Newznab: Setting up a Usenet Indexer
      • Sick-Beard: A PVR Relying on SABnzbd
      • Video Conversions
      • Advanced Usage of MediaWiki
      • Converting WMA to MP3
        • Netcat: File Transfer
        • Netcat: Creating a Listening Port
        • Netcat: Usage
        • Netcat: Remote Partition Backup
        • OpenSSH: SSH Key Exchange
        • OpenSSH: Creating an SSH SOCKS Proxy
        • OpenSSH : Tunneling VPN
        • OpenSSH: Graphical Window Forwarding
        • OpenSSH: Using Stepstones
        • OpenSSH: SSH Connection Multiplexing
        • OpenSSH HPN (High Performance): Implementation and Installation
      • Dnsmasq and dhclient: use a specific DNS for a specific domain
      • Trickle: Limit Your Application Bandwidth
      • Make Network Card LEDs Flash
      • Rename Network Interfaces to ethX
      • Proxychains: Proxy Any Outbound Connection
      • IP: Network Interface Management Command
      • Network: Creating Bonding
      • Cisco VPN Client: Installation on Red Hat 6
      • Displaying Active Machines on the Current Network
      • Check Connections Per IP
      • Bwm-ng: Measure Bandwidth Consumption in Real Time
      • DNS FQDN Name Resolution in Local Network
      • Kernel and Network: Pushing the Limits of Connectivity
      • Iperf: Testing End-to-End Bandwidth
      • IPv6: Complete Removal, IPv4 Only on Debian
      • Configuring a Local Network on Debian and Ubuntu
      • Ifrename: Renaming Network Cards Without Using Udev
        • APT: Adding Release Preferences for Specific Packages
        • Apt & Aptitude: Useful Commands
        • Apt-cacher-ng: Setting Up a Proxy for APT
        • Apt-file: Searching for Files That Prevent Compilation
        • Adding Red Hat DVD as a Repository
      • Fail2ban: Implementing automated iptables rules to counter bruteforce attacks
      • Acct: The Ultimate Keyfinder
      • Lshell: Limiting Shell Capabilities
      • Ulimit: Using System Limits
      • Secure Your Architecture with SELinux
      • Force User to Change Password at First Login
      • Encrypt and Decrypt a File with OpenSSL
      • Freeze a Machine by CPU Overload
      • Encrypting a Password with MD5
      • GnuPG: Encrypt Your Emails
      • Xinetd: Securing Services
      • Mount Disk Images from Command Line
      • Hdiutil: Creating a DVD ISO from a VIDEO TS folder
      • Compiling with GCC on Multiple Architectures (e.g., PPC and Intel)
      • Calibrating Your Laptop Battery
      • Clearing DNS Cache on Mac OS X
      • Viewing Hidden Files and Folders in Mac OS X
      • Hide an Open Application from the Dock and Switcher
      • MacFuse + NTFS-3G: Reading and Writing NTFS Partitions on Mac OS X
      • Installing OSX from an External Drive
      • Switching to Case-Sensitive File System on Mac OS X
      • Modifying the firmware with OpenWrt
      • Enabling SSH on the Fonera+
      • Modify the firmware with FrancoFON
      • Gmail: Having Multiple Email Addresses with a Single Gmail Account
      • Google Search Tips
      • Beamer: Create Beautiful LaTeX Presentations
      • LaTeX Template for Creating Cheat Sheets
      • OpenElec: Multimedia Solution for Raspberry Pi
      • Repairing a GoPro Hero Video
      • Reboot Your Freebox Server 6 via Command Line
      • BIOS Beep Codes and Their Meanings
      • Installing pfSense on Soekris
      • Upgrading the Soekris BIOS
      • OpenBSD Configuration and Installation via Serial Port on Soekris
      • Analyzing Network Equipment and Network Configurations
      • Configuring a Catalyst Switch
      • Capturing connections on an interface
      • Installation from Scratch of a Cisco Pix
      • Completely Reset a Cisco Configuration
      • Basic Configuration of a Cisco PIX
      • BGP Protocol and its Security
      • Network Flows
      • TCP Flags
        • Setting up a FreeRadius server
        • DaloRADIUS: Setting up a FreeRadius server with DaloRADIUS web interface
        • Apache SSO Authentication on AD Backend via Kerberos
        • Kerberos: Setting up a Kerberos Server
        • Authenticating Solaris Accounts on Active Directory
        • LDAP: Installation and Configuration of an LDAP Directory
        • Setting up a Synchronization Solution between ActiveDirectory and OpenLDAP
        • PhpLDAPadmin: Setting Up a Graphical Management Solution for OpenLDAP
        • LDAP: Installation and Configuration of a Secondary LDAP Directory
        • PAM Time: Setting Login Restrictions
        • PAM Cracklib: Configure Password Complexity
        • PAM-script: Execute Scripts at Authentication, Session Open and Close
        • PAM: Install pam_mkhomedir for Automatic User Home Directory Creation
        • PAM mount: Automatically Mount Network Shares at Login
        • PAM (Pluggable Authentication Module): Choosing Authentication Methods
        • PAM Mount and SshFS with Password Authentication
        • LemonLDAP::NG: More than just SSO
        • OpenID: Authentication Centralization
        • CAS: Setting Up an SSO Server
      • Rsync: Incremental Backup
      • BackupPC: A Complete Backup Tool
      • Unison: Backup like rsync but bidirectional
      • Amazon S3: Clean and Automated Backups with Amazon S3
      • Bacula: Setting Up a High-Performance Backup Server
      • ZRM: Automated Backups and Easy Restorations
      • Backups and Restorations with tapes
      • Rdiff-backup: Incremental Remote Backups
      • DevStack: Quickly Develop or Test OpenStack
      • OwnCloud: Create Your Personal Cloud
        • PuppetDB: Enhance Your Puppet Functionality
        • Puppet: Configuration File Management Solution
        • MCollective: Run Actions in Parallel on Remote Machines
        • Puppet Dashboard: Setting up a Graphical Interface for Puppet
      • Ansible: A Powerful Agentless Configuration Management and Orchestrator Solution
        • OpenVZ: Setting Up OpenVZ
        • WebVZ: Manage OpenVZ VMs with a Web Interface
        • Configuration and Usage of Solaris Zones (Containers)
        • Installing HA Zones with ZFS and Solaris Cluster
      • LXC: Install and configure the Linux Containers
      • Docker: Manage Containers Easily with Advanced Features
      • VServer: Setting Up VServer
        • MariaDB Galera Cluster: Multi-Master Replication
        • MySQL: Installation and Configuration
        • MariaDB: Migration from MySQL
        • XtraBackup: Optimizing Your MySQL Backups
        • MySQL: Backups, Restorations and Transfers
        • Replication Master to Master
        • MysqlTuner: Optimizing Your MySQL Server
        • Using MySQL
        • Purging MySQL Binary Logs
        • Running Multiple MySQL Instances on Solaris
        • PhpMyAdmin: Installation and Configuration
        • GreenSQL: Preventing SQL Injections with GreenSQL
        • Repairing MyISAM and InnoDB Databases
        • Setting up a MySQL Proxy
        • MySQL Cluster Load Balanced with Heartbeat
        • MySQL Replication Master to Slave
        • ElasticSearch: Powerful Search and Analytics Engine
        • PostgreSQL Installation and Configuration
        • Slony-I: Database Replication for PostgreSQL
        • PhpPgAdmin: Installation and Configuration
      • Sybase: Installation and Configuration
        • Advanced usage of Bind
        • Installing and Configuring a Primary Bind9 Server (Master)
        • NamedManager: A Nice Web Interface to Manage Bind
        • Bindgraph: Get Statistics and Graphs of DNS Queries
        • Securing a Bind Architecture
        • Installation and Configuration of a Bind9 Secondary (Slave) Server
        • Setting up a Bind server with LDAP backend
        • PowerAdmin: An Administration Interface for PowerDNS
        • PowerDNS: Creating a DNS Cache Server
        • PowerDNS: Creating a Master DNS Server
      • Unbound: Implementing a Next Generation DNS Server
        • Exchange: Repairing and Defragmenting Databases
        • Postfix: Limit Outgoing Mail Throttling
        • Postfix: hold outgoing mail transport
        • Installation and Configuration of Postfix and Courier
        • Simulate a black hole for a domain with Postfix
        • Running a Command When Receiving an Email
        • SASL: Secure Remote Email Sending with Postfix Server (SASL+TLS)
        • Troubleshooting mails with Postfix
        • Virtual Domains
        • Setting up an Antivirus (ClamAV and Amavis)
        • Secondary MX: Setup
        • Dkfilter: Proxy SMTP (Signature Mails) Made by Yahoo
        • Postsuper: Mass Deletion of Emails in the Queue
        • SSL: Certificate Management
        • Swaks - Swiss Army Knife SMTP
        • SpamAssassin Installation and Configuration
        • FuzzyOcr Plugin: Image Spam Detection (OCR Detection)
        • Fight Spam More Effectively - Additional Rules
        • Spam Reinjection for Testing
        • OpenSPF: Setting up OpenSPF
        • SPF (Sender Policy Framework): Prevention of Email Address Forgery
      • Getmail - An Alternative to Fetchmail
      • Z-Push: Setting Up an ActiveSync Server with Postfix (or How to Set Up Push Mail)
      • Setting up a complete antispam server
      • Setting up a Courier POP3 server with SSL
      • SquirrelMail: Setting up a Simple yet Advanced Webmail
      • AlterMIME: Automatically Add a Disclaimer to Outgoing Emails
      • Fetchmail - The Ultimate Mail Collector
      • Procmail: Filtering emails at the source
      • Postgrey: Setting Up Greylists to Fight Spam
      • IMAP Mailbox Synchronization
        • iSCSI: Setting up an iSCSI Server
        • Creating an iSCSI Share Between Solaris and Debian
        • Installing and configuring Samba as a Domain Controller
        • Trick Samba Share Size Display
        • Installation and Configuration of Samba in 'User' Mode
        • Problems with saving Office, Adobe... file types
        • Mounting a Windows Share from Samba
        • Installation and Configuration of Samba in User Mode (Authentication on an OpenLDAP Server)
        • Installation and Configuration of Samba in ADS Mode (Authentication on an AD Server)
        • Installation and Configuration of Samba in "Share" Mode
        • Network Recycle Bin
        • SSLH: Multiplexing SSL and SSH connections on the same port
        • Vsftpd: Setting up virtual hosts with MySQL
        • MySecureShell: Setting up a Secure File Transfer Solution
        • PhpFtpWho: Connection Monitoring for Proftpd
      • NFS: Setting up an NFS Server
      • AOE: Setting Up an ATA Over Ethernet Server
      • Setting up a Unix systems specialized Home server
      • UploadTool: Setting up a file sharing tool via Apache
      • AutoFS: Mounting and Unmounting Shares
        • HAProxy: Load Balance Your Traffic
        • Load Balancing and Fail Over for Web Services
        • Installation and Configuration of a Heartbeat V2 Cluster
        • Installation and Configuration of a Heartbeat V1 Cluster
        • Pound: Installation and Configuration of a Reverse Proxy
        • Installation and Configuration of KeepAlived/Pound with Failover and Session Support
        • Installation and Configuration of Red Hat Cluster Suite
        • Installing a Red Hat 4 Cluster
        • Ceph: Performance, Reliability and Scalability Storage Solution
        • Installation and Configuration of DRBD
        • GFS2: Red Hat Cluster Filesystem
        • OCFS2: Oracle's Cluster File System
        • GlusterFS: High Availability Cluster Filesystem
        • Installation and Configuration of SUN Cluster
        • Setting up a quorum server
        • Installation of Sun Cluster
        • Upgrading SUN Cluster
        • Introduction and Architecture of Setting Up a SUN Cluster
      • Load Balancing Multiple WAN Connections
      • Installation and Configuration of Pacemaker
      • Quickly Grant User Access to Cluster Commands
        • Multipath: Configuring Multiple Paths for External Disk Access
        • Migrating from Multipath to Powerpath on RedHat
        • OpenFire: Installation of OpenFire
        • EJabberd: Setting up a Jabber server (instant messaging)
        • NTP: Creating an NTP Server
        • OpenNTPd: Setting up an NTP server on OpenBSD
        • Satellite: Deploying Red Hat OS via Red Hat Satellite
        • TFTP: PXE Server, OS Deployment under Linux
      • Seafile: Make Your Personal Storage Cloud Easily
      • Firefox Sync Server: Create Your Own Sync Server
      • Sphinx: Setup a Full Text Indexer
      • Firefox: Mass Management on Windows Environment
      • Rancid Search: Setting Up a Search Tool for Rancid
      • CUPS: Setting Up a Print Server
      • MediaTomb: Setting up a multimedia (UPnP) server
      • Asterisk: Setting up Asterisk PBX and Web-Based Provisioning GUI
      • Asterisk: Setting up Asterisk PBX and Web-Based Provisioning GUI
      • OCS Inventory: Setting up Automatic Network Inventory
      • Setting up a Watchdog
      • Setting up a WiFi Hotspot
      • Basic Architecture with Asterisk and Freephonie
      • AvantFax: Setting Up a HylaFax Server with AvantFax
        • Create Your Own Graphs
        • Installation and Configuration of Cacti
        • Observium: An Advanced Interface for Collectd
        • Visage: A Web Interface for Collectd
        • Collectd: Installation and Configuration
        • Heymon: A Web Interface for Collectd
        • Jarmon: A Web Interface for Collectd
        • Collection3: A Web Interface for Collectd
        • Fluentd: Quickly Search in Your Logs with Elasticsearch, Kibana and Fluentd
        • Syslog-ng: Installation and Configuration of Syslog-ng
        • Rsyslog: Installation and Configuration
        • PHP-syslog-ng: Interpretation of Syslog-ng logs in a web interface
        • Tenshi: System Log Analysis
        • Monit: Easily Use Triggers on Your System
        • Munin: Monitor your servers in a very simple way
        • Monitoring Windows with Munin
        • Monit and Munin: Monitor with Munin and Get Alerts with Monit
        • Nagios: Installation and Configuration
        • Email Summary of Current Nagios Alerts
        • Setting up a distributed monitoring solution with Nagios, CheckMK and Thruk
        • Thruk: An Advanced Interface for Nagios and MKlivestatus
        • Check MK: Easily collect Nagios information and extend its capabilities
        • PNP4Nagios: Graph Your Nagios Alerts
        • Nagios: Improving the Look of Notification Emails
        • NDOUtils: Sending States to a Database
        • NagVis: Map Your Architecture with Nagios Alerts
        • Nagios: 2 Load Balancing
      • Glances: All in One Monitoring Shell Tool
      • Shinken: Installation and Configuration of Nagios' Successor
      • MRTG: Network-Focused Monitoring
      • SNMP: The Network Management Protocol
      • Mailgraph: Email Monitoring (Spam, Rejects, Viruses...)
      • RRDtool: Create Your Own Graphics with RRDtool
      • Weathermap4RRD: Creating Monitoring Maps
      • Installation and Configuration of a Centreon Server
      • Oreon: Setting up a simplified and more elegant solution for Nagios
      • Smokeping: Monitoring Latency
      • Xen and vserver: monitoring VMs on a PHP page
      • Watchdog: Hardware Problem Detection
        • DHCP: Installation and Configuration of a DHCP Server
        • Setting up DHCP Failover
        • OpenVPN: Setting up OpenVPN on different platforms
      • Setting up VLAN
      • NTOP: Installation and Configuration of NTOP (Network TOP)
        • Basic IPTables Commands
        • Iptables: Configuration Examples
        • Launch Firewall Rules Before Interfaces Come Up
        • Nfqueue: Filter Thousands of IP Addresses (e.g., by Country)
        • Introduction to Packet Filter
        • Packet Filter: Fighting Against Brute Force Attacks
        • Introduction to IDS and SNORT
        • Setting up Snort & BASE (Basic Analysis and Security Engine)
      • Create a PKI
      • Banners: Hiding Application Banners (Service Banner Faking)
      • Rinetd: Simply and Quickly Forward to Other Machines
      • Stunnel: Creating an SSL Tunnel
      • Rkhunter: Detection of rootkits and malware
        • CVS Installation and Configuration
        • CVS: Using CVS
        • Setting up ACLs for CVS
        • Setting Up a Git Server and Client
        • Gitweb: Installation and configuration of a web interface for git
        • Nginx Git and Gitweb
        • Installation and Configuration of an SVN Repository
        • SVK: Creating a Read-Only Mirror for SVN
        • KVM: Setting Up KVM
        • Converting a VMware Disk Image for Qemu or Xen
        • Migrating from Xen to KVM
        • QEMU: Windows Installation
        • Setting up Xen
        • XenServer 5.0: Tips & Tricks
        • XenServer 5.0: Configuring XenServer with SUN Hardware
        • XenServer 4.1: Changing the Management Interface
        • Converting VMware Images to Xen
        • Ganeti: Xen Cluster Management
        • Xen Conversion P2V
        • Xen with Bonding + VLAN Tagging
        • Port forwarding from dom0 to bridged domU with IPVS
        • Theme for Apache Directory Index Listing
        • Proxy: Creating a proxy with Apache
        • Real-time monitoring of your Apache server
        • Apache 2 Installation and Configuration
        • Mixing Apache Authentication
        • WebDAV: Securing with SSL
        • Memcached: Setting up a Cache Server for Apache
        • Setting up SSL certificates with Apache 2
        • Securing Apache with mod_security
        • Slotlimit: Apache Module to Limit Apache Resources
        • Geolocation with Apache 2
        • Load Balancing with Apache 2
        • Varnish: a website accelerator
        • Lighttpd: Installation and configuration of an Apache alternative
        • WebDAV with Lighttpd
        • Setting up OpenSSL with Lighttpd
        • Vlogger: Splitting Lighttpd logs with statistics generation
        • Nginx: Installation and Configuration as an Apache Alternative
        • NAXSI: Integrate a WAF for Nginx
        • PageSpeed: Optimize Your Rendered Code On The Fly
        • Nginx + Varnish: Cache even in HTTPS by offloading SSL
        • HTTP Substitutions Filter: Multiple Filters with Regex on Response Bodies
        • TinyProxy: Setting up a Simple and Fast Proxy
        • Squid: Installation and Configuration of Squid
        • SafeSquid: Setting Up a Content Filtering Proxy
        • SafeSquid: Coupling with ClamAV to Filter Viruses on Incoming Traffic
      • Managing SSL Certificates Signed by a Certificate Authority
      • Tomcat: Setting up a Tomcat server
      • Benchmark Your Website
      • Selenium: Task Automation for Web Environments
      • Checking Your Website Security with Nikto
      • Symfony: Installation and Configuration of the PHP Framework
      • PHP: Installation and Configuration
      • Creating a Favicon for a Website
      • Preventing your website from being indexed (disabling robot scans)
      • Testing Load on Servers and Web Applications
      • Trac: Setting up a Tracking Solution
      • Accelerating CGI Scripts with SpeedyCGI-PersistantPerl
        • MediaWiki: Installation and Configuration
        • Practical Extensions for MediaWiki
        • Basic Usage of MediaWiki
        • Tiny Tiny RSS: An Alternative to Google Reader
        • Selfoss: An Elegant RSS Reader
        • Advanced WordPress Usage
        • WordPress: Useful Extensions
        • Setting up Memcached on WordPress
      • Piwik: Statistics for Your Website
      • Pootle: Simple Translation Tool
      • Bugzilla: Setting Up a Ticketing Tool
      • Jenkins: Setting up a continuous integration tool
      • Limesurvey: Setting up a Survey Solution
      • OTRS: Setting up a ticketing tool
      • MyTinyTodo: A Simple Task Management Tool
      • Ajaxterm: Using a Terminal via Web
      • Awstats: Setting up Awstats, a Web Logs Interpreter
        • SMF: Service Management Facility
        • Convert MySQL RC Script to SMF
        • User Management
      • Setting up OpenLDAP Client
      • Jumpstart: Automating Solaris Installations Without Networks
      • DTrace: Real-time Problem Detection
      • Setting up VNC server on Solaris
      • Using the Web Console
      • Setting up Nagios NRPE on Solaris 10
      • SSH: Setting up SSH Server on a Minimal Solaris Installation
      • ZFS: The Filesystem Par Excellence
      • Tmpfs: Mounting a RAM filesystem on Solaris
      • Adding Swap Space on Solaris
      • Disk Management in Solaris
      • Mount an ISO image on Solaris
      • ACL: Implementing NT-Style Permissions on Solaris
      • Multipathing Management on Solaris
      • Creating a RAID 1 (mirroring) on Solaris
      • How to Check the Number of Active CPU Cores on Solaris
      • Finding a Process Running on a Specific Port on Solaris
      • Managing Solaris Processes
      • Changing Solaris Locales
      • Monitoring Superuser Access
      • Changing Hostname on Solaris
      • Removing User Limitations
      • How to Determine Your System Architecture
      • Some information about the machine
      • Get Unix Format Time on Solaris
      • Monitor Your Solaris Users
      • OpenBoot PROM, BIOS Management
      • Patching Solaris
      • Configure Network on Solaris
      • IPMP Configuration
      • Modifying Network Card Parameters
      • Make Unsupported Network Cards Work with Solaris
      • Pkg-get: Setting up a Repository System for Solaris
      • Automating Installation of Many Packages
      • Solaris Package Management
      • Managing Updates with Update Manager and smpatch
      • Creating a Solaris Package
      • WinDbg: Analyze Crash Dump
      • Installing Rsync on Windows
      • Modifying NTP Synchronization Servers on Windows
      • Deploying Power Management on a Server for its Clients
      • OpenSSH: Using Putty and an HTTP proxy to ssh anywhere through firewalls
      • Windows XP: Memory Overflow Problems
      • WSUS: Save Disk Space (Purge Unused Updates)
      • Windows: Stop a system shutdown in progress
      • Windows: Refreshing Security Policies (GPO)
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    On this page

    Misc

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    Debian

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    RedHat

    article

    Systemd: How to Debug on Boot Failure

    Guide on how to debug systemd boot failures including checking failed services, getting service …

    article

    Vagrant: Quickly Deploy Virtual Machines

    Learn how to use Vagrant to easily deploy and manage virtual machines for development and testing …

    article

    Sysstat: Essential Tools for Analyzing Performance Issues

    Learn how to use Sysstat tools including iostat and sar to monitor and analyze system performance …

    article

    Activating the Serial Port on Linux

    Learn how to configure and activate the serial port on Linux systems for remote access and …

    article

    GRUB: Using a Bootloader

    A comprehensive guide on using GRUB bootloader for Linux and other operating systems, including …

    article

    Connect to Debian via Serial Port

    Guide to set up and use a serial port connection to a Linux machine, including minicom configuration …

    article

    Disable Screen Standby on Debian

    How to disable screen standby and screen locking on Debian systems.

    article

    DrawIt: A VIM Extension for Creating ASCII Diagrams

    Guide on how to install and use DrawIt, a VIM extension that allows creating ASCII diagrams directly …

    article

    Converting Unix Timestamp to Date

    How to convert Unix timestamps to human-readable dates using various command-line methods.

    article

    GS: Merge Multiple PDFs Into One

    Learn how to use GhostScript (GS) to merge multiple PDF files into a single document.

    article

    Measuring Execution Time of One or Multiple Commands

    How to measure the execution time of commands in Unix-like systems

    article

    Sending Emails from Command Line

    Guide to sending emails via command line using mail and mutt on Unix/Linux systems, with examples of …

    article

    Sudo: Running commands as root without being root

    Learn how to use sudo to execute commands with root privileges without logging in as root, including …

    article

    Manipulating Images via Command Line

    How to manipulate images using command line tools with ImageMagick

    article

    Getting Hardware Information from a Machine

    A guide on how to obtain hardware information from different operating systems including Linux, BSD, …

    article

    Linux: Launching Daemons at Boot

    Guide explaining how to configure daemons to automatically start at boot time on different Linux …

    article

    IRC: Setting up an IRC server with UnrealIRCD and Anope Services

    Documentation and resources for setting up an IRC server using UnrealIRCD and Anope Services

    article

    Understanding Time Management in Linux

    Documentation explaining how priorities work in relation to time allocation in Linux systems

    article

    VirtualBox: VMware Alternative

    A guide on installing and configuring VirtualBox as an alternative to VMware on Linux systems

    article

    Understanding Load Average

    A comprehensive guide to understanding how Load Average works in Unix systems and how to properly …

    article

    Installing Mac OS X and Ubuntu in Dual Boot

    A guide on how to install Mac OS X and Ubuntu in dual boot configuration on the same hard drive.

    article

    Linux Boot Process

    Documentation about the Linux boot process

    article

    Replacing an installed RedHat with Debian without formatting

    How to replace a RedHat installation with Debian without formatting the disk or losing data

    article

    Enabling and Disabling Screen Savers from Command Line

    How to control screen power management using the command line in Linux for automatic display shutoff …

    article

    Wine: Running Windows Applications on Linux

    A guide on how to use Wine to run Windows applications on Linux systems

    article

    Activating the Numeric Keypad

    How to enable the numeric keypad by default in console mode and in X Window System.

    article

    How to Check BIOS Version Without Rebooting

    A simple method to check your system's BIOS version from Linux without having to reboot

    article

    Creating an ISO Image

    Methods for creating ISO images in Linux using simple commands like cat and dd.

    article

    Gentoo: Using Portage

    A guide to effectively use Gentoo's Portage system for package management, including installation, …

    article

    Gentoo: Getting Started

    Learn essential commands and tips for getting started with Gentoo Linux after a fresh installation.

    article

    RAM Information

    Understanding memory management in Linux systems, including disk cache usage and how to correctly …

    article

    Uncompress for Different Formats

    A guide to uncompress different types of archive formats in Linux including RPM, DEB, ZIP, CAB, and …