Table des matières

Qu'est ce que VNC
Prérequis
Installation de tigervnc
Configuration

Les utilisateurs
Les services
Le parefeu

Activation des services
La connexion

Qu'est ce que VNC
Pour toutes les informations sur le protocole VNC se référer à l'article Le service VNC
Prérequis
Il faut bien entendu avoir une interface graphique opérationnelle (Ici GNOME)
On met le système à jour :
Code BASH :

yum update

 
Installation de tigervnc
On installe les paquets Read More →

ssh-picture

Install Parallel SSH to connect to multiple hosts.
By the way, PSSH package includes pscp.pssh, prsync, pslurp, pnuke commands and you can use them with the same usage of pssh.
https://www.server-world.info/en/note?os=CentOS_7&p=ssh&f=9

fig18-01

Distributed file systems make files on one computer accessible over the network to other computers
- An example: Sun's NFS network file system
- Provide, if possible, the same semantics as a local file system.

As we can see from the above diagram:
- NFS (network file system) converts user-level command to RPC
- NFS server reverses the process, converts Read More →

15604533686_a8c0ae7b89_z

Out of the box, enterprise Linux distributions such as CentOS or RHEL come with a powerful firewall built-in, and their default firewall rules are pretty restrictive. Thus if you install any custom services (e.g., web server, NFS, Samba), chances are their traffic will be blocked by the firewall rules. You need to open up necessary Read More →

gnu-head-sm

search
search [-f | -l | -s] NAME
- Search devices
-f by filename
-l by filesystem label
-s

Examples,

search -l INTREPID
hd0,2

search -f /boot/grub/menu.lst
hd0,2 hd0,3 hd0,5

search -f /boot/grub/grub.conf
hd0,2

configfile
configfile FILE ......
- load a grub.cfg file - make convenient use of the commands and information already typed into the file
- You would Read More →

7_grub_command

GRUB's Command Line Interface (CLI) is one of GRUB's most useful and powerful features. GRUB is actually a miniature operating system in its own right and it can take a rich variety of commands and provide useful feedback to the user. GRUB's CLI Mode is one thing that sets GRUB head and shoulders above all Read More →

basic-lvm-volume

LVM (Logical Volume Manager) permet de gérer des partitions logiques, et non pas physiques, ce qui a notamment comme avantage de pouvoir plus facilement modifier leur taille.
Pré-requis
Partition non formatée
Il faut disposer d'une partition non formatée. Dans notre cas, il s'agit de /dev/sda9, qui dispose d'un peu plus de 300 Go de libres. Cette partition sera Read More →

logo-linux

Re-install bootstrap code (GRUB)
Please perform the following steps:

Boot from CentOS installation disc (for example, CD #1 or DVD).

For CentOS-4 or CentOS-5 type "linux rescue" at the "boot:" prompt. For CentOS-6 pick "Rescue installed system" from the boot menu.

Mount all filesystems in read-write mode.

Change root to real root ('/') on your hard Read More →

broadcom-patch-kompile

Contents

Broadcom Corporation BCM4311, BCM4312, BCM4313, BCM4321, BCM4322, BCM43224, BCM43225, BCM43227 and BCM43228 Based Wireless NICs

Step 1: Determining WLAN chip and installing dependencies
Step 2: Downloading and extracting Broadcom driver archive
Step 3: Compiling the Broadcom driver module
Step 4a: Loading the driver module into kernel
Step 4b: Loading the driver module into kernel on boot time

In order to install Read More →

header-wna1100-3-4lft-wcradle-photo-large

Drivers :
Windows drivers necessary for Netgear WNA3100
Based on:
http://sourceforge.net/apps/mediawiki/ndiswrapper/index.php?title=Netgear_WNA3100

1. Connect the WNA3100 and:

$lsusb

It should list:

Bus 001 Device 003: ID 0846:9020 NetGear, Inc. WNA3100(v1) Wireless-N 300 [Broadcom BCM43231]

2. Get the latest ndiswrapper source:

http://sourceforge.net/projects/ndiswrapper
At moment of writing: v1.58

3. Unpack in /usr/src or any other directory
4. Make sure to uninstall everyting you have on ndiswrapper:
apt-get purge ndiswrapper-source ndiswrapper-dkms Read More →

Fotolia_45264356

Contents

1 Introduction
2 Wireless Linux Compatible NICs
3 Common Wireless Networking Terms

3.1 Wireless Access Points
3.2 Service Set ID
3.3 Encryption

3.3.1 Wired Equivalent Privacy
3.3.2 Wi-Fi Protected Access

4 Networking With Linux Wireless-Tools

4.1 Using iwconfig For wireless-tools Configuration
4.2 Permanent wireless-tools Configuration

4.2.1 Fedora / RedHat
4.2.2 Debian / Ubuntu

4.3 WEP Encryption Configuration

4.3.1 WEP Encryption Configuration

4.3.1.1 WEP Key Generation

4.3.1.1.1 Table 13-1 Byte Count to Read More →

centos_icon_60

CentOS 6.2 + GNU gdb (GDB) Red Hat Enterprise Linux (7.2-50.el6)
When I debug a simple c++ code with GDB, I saw the following warning:
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.47.el6_2.9.i686 libgcc-4.4.6-3.el6.i686 libstdc++-4.4.6-3.el6.i686

debuginfo-install is a command of yum-utils, so

yum install yum-utils
debuginfo-install glibc
if the warning's still Read More →

Eclipse

Problem
After upgrading Centos to 6.6, you may find that your eclipse crashes on opening any file.
Try opening eclipse using command line (console), and when it crashes, you may see an error similar to this:-

eclipse: cairo-misc.c:380: _cairo_operator_bounded_by_source: Assertion `NOT_REACHED’ failed.

Solution
I was using Eclipse Luna, and this issue could happen with prior versions too. So, edit eclipse.ini Read More →