Often it is necessary for testing purposes to recreate the networking conditions found in a high latency network, such as a satellite link. Firstly create a network bridge that can be placed inbetween the test network and its router. To increase network latency use the following command: tc qdisc add …
IP packet drop can be easily emulated on any section of network using a Linux Bridge and a single iptables command: iptables -t mangle -A FORWARD -m statistic –mode random –probability 0.01 -j DROP (where probability is expressed as a value between 0 and 1) If the intention is to …
Pour la console système kernel : vga= Colors ( depth) 640×480 800×600 1024×768 1280×1024 1600×1200 —————+——-+——-+——–+———+——— 256 ( 8 bit)| 769 771 773 775 796 32,768 (15 bit)| 784 787 790 793 797 65,536 (16 bit)| 785 788 791 794 798 16.8M (24 bit)| 786 789 792 795 799 viaShrimpWorks …
Siege is a fantastic utility for helping with Linux server management by exposing problems before they go into production. It’s open source software (GPLv2 or later) and easy to get started with. Siege is packaged for Debian and Ubuntu, but it doesn’t look to be packaged for Fedora and openSUSE …
Build cross-compiled kernel debian package Par Jérôme Pouiller le vendredi, octobre 29 2010, 09:37 – Lien permanent As you may know, you have juste to add options ARCH and if necessary CROSS_COMPILE to command line: make ARCH=powerpc CROSS_COMPILE=ppc-linux-gnu- XXX_defconfig make ARCH=powerpc CROSS_COMPILE=ppc-linux-gnu- XImage My primary concern is to compile an …
Multiple light-weight httpd server In search for a lightweight solution to run some php pages on my Debian diskless shellserver it appears there are several lightweight httpd daemons in Debian that can do php. I created some virtual machines on KVM to do some testing. Here follows a short howto …
A – search for rootkits B – more detailed investigation C – more trails D – remove it! E – refresh system F – Todo G – Infos Start with these tools: chkrootkit rkhunter A – search for rootkits chkrootkit: Checking `ifconfig’… INFECTED Checking `pstree’… INFECTED Searching for t0rn’s v8 …
Variables en shell Bash Manipulation de variables simples var=val ou var= »a b » affectation de la variable « var » $var ou ${var} contenu de la variable « var » ${#var} longueur de la variable « var » export var ou declare -x var exportation de la variable « var » vers les shells fils set affichage de l’ensemble …
How to debug or test cron script If your simple cron script (/etc/cron.daily, etc/cron.hourly etc) does not run as expected, do the following: 1. be sure to have ‘#!/bin/sh’ as the first line 2. make sure the script’s name does not contains ‘.’. for example, you should rename ‘yourscript.sh’ to …
rrdtool info nom du rrd, pratique pour avoir la liste des dsname qu'il contient