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Linux Performance Tools: CPU and Memory
Dec 17th
3.2. Linux Performance Tools: CPU and Memory
Here begins our discussion of performance tools that enable you to extract the memory performance information described previously. Read the rest of this entry »
15 Practical Grep Command Examples In Linux / UNIX
Oct 28th
You should get a grip on the Linux grep command.
This is part of the on-going 15 Examples series, where 15 detailed examples will be provided for a specific command or functionality. Earlier we discussed 15 practical examples for Linux find command, Linux command line history and mysqladmin command.
In this article let us review 15 practical examples of Linux grep command that will be very useful to both newbies and experts.
Read the rest of this entry »
Simple Vi Cheat Sheet
Sep 7th
Un petit pense-bête bien pratique sur les commandes Vim Read the rest of this entry »
NTFS Cloning and shrinking
Jul 21st
“Honey, I shrunk the filesystem!”
Recently I bought a solid-state harddisk, an Intel X25M. I wanted to use this disk in my Windows development system, without having to do a fresh install of Windows XP. I really didn’t want to install all my applications again, not to speak of all the custom configurations and tweaks I usually apply to Windows to make it palatable. So I thought I’d just make a image copy of my old harddisk to this new one, and be done with it.
Freenas/ZFS and FreeNAS expansion
Jun 25th
Disclaimer: Use this info at your own risk, don’t come to me if all your data disappears one day. But it works for me.
Freebsd Disk management GEOM : Howto
Jun 23rd
1. Pré-requis : présentation de GEOM
GEOM [1] [2] est un framework d’abstraction d’accès à des raw-devices via des classes (CONCAT, ELI, LABEL, MIRROR, NOP, RAID3, SHSEC, STRIPE, VINUM) ; chaque classe représente un typ1. Pré-requis : présentation de GEOM
GEOM [1] [2] est un framework d’abstraction d’accès à des raw-devices via des classes (CONCAT, ELI, LABEL, MIRROR, NOP, RAID3, SHSEC, STRIPE, VINUM) ; chaque classe représente un type d’action sur ces raw-devices. Il est possible de combiner plusieurs classes sur un même device, et ce, dans différents ordres, ce qui éloigne fortement GEOM des autres ” volume managers ” qui ont une typologie beaucoup plus stricte.
Un peu de vocabulaire :
- Une classe implémente un type particulier d’action sur ces raw-devices (disques durs IDE, SATA, SCSI ; clés USB ; fichiers ” filesystem ” montés sur une loopback mdconfig(3)) ;
- Un provider est le device résultant de l’action de GEOM sur ces raw-devices ;
- Un consumer est le device sur lequel s’applique la classe, au départ, le device physique.
Le handbook comporte un chapitre très complet sur GEOM [3] : ” Chapter 18 GEOM : Modular Disk Transformation “.
sed Tutorial
Apr 26th
| sed tutorial | |
| � sed introduction � sed examples #1 |
� sed commands � regular expressions � more sed examples |
| intro | home – top of the page – email |
sed – Stream EDitor – works as a filter processing input line by line.
Sed reads one line at a time, chops off the terminating newline, puts what is left into the pattern space (buffer) where the sed script can process it (often using regular expressions), then if there anything to print – sed appends a newline and prints out the result (usually to stdout). Read the rest of this entry »
