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Qemu Commands

Some useful command to help running and setup qemu…

Create an empty compressed 10 Go disk image (in qcow2 format):

$ qemu-img create -f qcow2 /home/kevin/qemu-disk-image.qcow 10G

Boot on your machine’s CD-Rom in qemu with previous disk image as primary HDD:
```
$ qemu -cdrom /dev/cdrom -hda …
```

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How-To Mount a File System Binary Image

Obtain a Binary Image¶

We have a USB key with a file system on it, and we want to save its content. We do a binary image using:

$ dd if=/dev/sda1 of=/home/kevin/usb_key.img

Mount the Image File¶

Get informations about the file system of the image …

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Remote Backup With Rsync

This little article describe how to setup an automatic backup procedure to a remote machine via the rsync tool.

Prerequisites¶

A distant server, where backup will be stored (homeserver.com in this case),
A user account on this server (mine was kevin),
A ssh deamon running on the server that …

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Créer Un Espace De Stockage Fiable Avec RAID 5 Et LVM Sous Linux

Cet article explique comment créer un espace de stockage redondant et fiable en utilisant du matériel grand public et bon marché. Cela est possible par la combinaison de Linux, des mécanismes RAID logiciel et du gestionnaire de volumes logiques LVM.

Mise à jour: Le but initial était d’utiliser des …

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How-To Empty CUPS Spool

Here is a tiny helper script I call regularly by a cron job to flush the spool of my CUPS server as after several weeks of usage my server end up full of unprinted documents junk:

#/bin/sh!
service cups stop
rm -f /var/spool/cups/*
rm -f /var/spool …

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Script De Reconnection Automatique PPP

Voici un petit script trivial en bash qui, couplé à cron, me permet de maintenir ma connexion internet 56kbps fournie par Free.fr (en attendant l’arrivée du modem ADSL):

#!/bin/bash
# Script de reconnection automatique

testconnect() {
  CONNECT=`ping -c 3 google.com | grep packets | cut -d' ' -f4`
}

doconnect() {
  logger …