System

16/06/2016
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How to modify an invalid /etc/sudoers file?

Here is what happens: $ sudo visudo >>> /etc/sudoers: syntax error near line 28 <<< sudo: parse error in /etc/sudoers ...
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Configuration d’un serveur dédié de A à Z

Installation, configuration et administration d'un serveur dédié Ces tutoriaux ont été réalisés sous Debian (versions Etch 4.0 et Lenny 5.0) ...
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Bash Shell Loop Over Set of Files

Bash Shell LoopHow do I run shell loop over set of files stored in a current directory or specified directory? ...
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OpenVPN Documentation

Source: OpenVPN official documentation OpenVPN daemons (JSON format): ./sacli VPNStatus Show the number of users currently connected to the VPN: ...
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Find Duplicate Files (based on size first, then MD5 hash)

Terminal - Find Duplicate Files (based on size first, then MD5 hash) find -not -empty -type f -printf "%s\n" | ...
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Split OpenVPN configuration files

Source: npm Splits OpenVPN (.ovpn) files into separate files for private key, user+ca certificates and tls-auth key, for use with ...
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Typical iptables

# Modify this file accordingly for your specific requirement. # http://www.thegeekstuff.com # 1. Delete all existing rules iptables -F # ...
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(D)DoS Deflate

About (D)DoS Deflate is a lightweight bash shell script designed to assist in the process of blocking a denial of ...
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How To Use Port Knocking to Hide your SSH Daemon from Attackers on Ubuntu

Introduction Servers, by definition, are implemented as a means of providing services and making applications and resources accessible to users ...
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How To Configure Port Knocking Using Only IPTables on an Ubuntu VPS

Source: digitalocean.com Introduction Servers that are connected to the internet are subjected to all manners of attacks and probes by ...
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Configurer IPTables pour Netfilter sous Debian Squeeze

Qu’est-ce que c’est? IPTables regroupe les lignes de commandes nécessaires à la gestion de Netfilter. Oui mais que fait Netfilter ...
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Ignore existing files or update only newer files with rsync

Rsync is a useful command line utility for synchronising files and directories across two different file systems. I recently needed ...
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How to change the MAC address of an Ethernet interface

Change the MAC address of an Ethernet interface temporarily Check MAC addresses: $ ifconfig -a | awk '/HWaddr/ {print "Interface: ...
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Clone Your Ubuntu installation

If you want to create a system that is similar to a different system you have already set up, it ...
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Cluster ssh

cssh: un outil pour les paresseux…

Cluster ssh est un outil merveilleux ! Combien de fois ai-je du retaper les mêmes commandes dans deux fenêtres shell ...
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15 Linux Find Command Examples (Part2)

Find Files Based on Access / Modification / Change Time You can find files based on following three file time ...
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