Admistration, configuration, déploiement, optimisation et tuning.

Archive for the ‘Linux’ Category

NuxOra a marqué une petite pause

NuxOra a marqué une petite pause durant fin Avril et le mois de Mai et sera de nouveau actif des le debut du mois de Juin.

Les projets en cours:

  • La documentation Jboss
  • Une documentation OAS d’administration
  • Quelques notes sur la 10g RAC peut-etre
  • L’avancée du projet NuxOra.net et mes scripts de déploiement automatique Linux, Oracle, Apache, TSM, ….

Debian v.4 – Etch

La derniere version de Linux Debian est enfin sortie: version 4 avec pour nom de code Etch.

Longtemps retardé Etch voit enfin le jour. La version supporte onze architectures, Gnome (moteur graphique) a été mis jour, Etch embarque également Iceweasel et Icedove, des versions respectives de Firefox et Thunderbird, mais dépourvues de la marque Mozilla.

Zenoss – presentation

The new version of Red Hat Entreprise Linux was launched on March 14th. RHEL 5 includes a lot of new features such as:

  • Application Design/Construction/IDE/Analysis
  • Application Server/Integration Server
  • Back-Office Enterprise
  • Collaboration/Groupware/Messaging
  • Consumer
  • Content Management/Authoring
  • CRM
  • Enterprise Resource Planning
  • Information Access/Delivery/Mining/Portal
  • Information/Data Management/Database
  • Middleware/Message-oriented/Transaction
  • Network Management
  • Networking
  • Other Development Tools
  • Security
  • ServerWare/Clustering/Web/VM
  • Storage
  • Systems Management

Considering the Network management, i’ll do a short focus on Zenoss.

Zenoss is an open source network monitoring and systems management platform – 1 year old :-) it was launched in March 2006.
Zenoss is a full package. It is built on the Zope Application server (python technology).

You can monitor what ever you want (if it has an ip address): network devices: appliance (firewall, switch,…) or server, applications (web site,…), operating systems, environment,…

Your standard protocol tools:
SNMP, SNMP Trap, Ping/ICMP, SSH/Telnet, Syslog, WMI, Nagios Agents, XMP/RPC Interface

Zenoss provides
Availability – It test all your device and appliance with a continious scheduling
Inventory and configuration – You can manage all your appliance by device or groups
Discovery – It can describe all your IT environment
Performance monitoring – Collect data from your server, network, and application graphing them
Event management – Collect data (syslog, WMI, SNMP trap, custom events (as defined by the Zenoss web services API)) and analyse it by correlation.
Reporting – You can create your own and custom reports
Web portal – You have a web console (off course with AJAX components) to view and control with a secure access all the elements with a real-time information

En recherche active sur Grenoble

Je suis actuellement à la recherche d’un poste en region Rhône-alpes, à Grenoble.
Ma mission actuelle se termine le 30 Mars. Je suis disponible à partir du 2 Avril.

Je recherche parmi les types de postes ci dessous:
Architecte technique
Chef de projet technique
Administrateur Systeme Linux et/ou DBA Oracle

L’environnement technique du poste pourrait etre basé sur Linux, Oracle (base de données et serveur J2EE), le monde open-source (serveur d’application J2EE jboss, supervision avec Nagios/Cacti)
Le poste serait donc idéalement axé sur de fortes compétences techniques, pour un rôle d’expertise, de gestion de projet, ou d’administration (je ne souhaite plus m’orienter vers du développement)

N’hesitez pas à me contacter par mail ou par téléphone:

Formulaire de contact mail.

Mon CV (en français)

Red Hat Enterprise Linux 5

Red Hat has released the new version of it’s operating system RHEL 5 (Red Hat Enterprise Linux). RHEL 5 implements a totally integrated Xen-based server and storage virtualization solution, by combining server virtualization with Red Hat’s clustering support. In addition, RHEL 5 comes with a virtualization manager that should make installing and administering Xen virtual machines much easier.

Performance and scalability improvement have been done with this new version. The kernel version is now 2.6.18 (previously it was 2.6.9) Security with RHEL 5′s SELinux (security enhanced Linux) was also improved and should be easier to use.

Another big evolution is the introduction of yum. You should be able to have a yum repository. Everything will be based on yum (the system-config-packages, the RHEL update,…)

In the meanwhile, you may have already tested the RHEL 4 update 5 (which is the first update for RHEL 4 to include Xen paravitualized kernels). It was released last week, and the main evolve is the integration of XEN. Xen is the open source virtualization effort that Red Hat has already included in its Fedora community Linux releases (with Fedora Core 6) and is part of Novell’s SUSE Linux Enterprise 10 release as well, for many months now.

http://www.redhat.com/
http://www.europe.redhat.com/rhel/
http://www.xensource.com/

Sendmail: quick start

First you have to edit the config file
vi /etc/mail/sendmail.mc
you have to know your smtp server:


dnl # Uncomment and edit the following line if your outgoing mail needs to
dnl # be sent out through an external mail server:
dnl #
define(`SMART_HOST’,`serverSMTP’)
dnl #
define(`confDEF_USER_ID’,“8:12”)dnl
dnl define(`confAUTO_REBUILD’)dnl
define(`confTO_CONNECT’, `1m’)dnl

Then, generate the .cf file with ‘m4′ tool:
m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

You now have a new config file for our sendmail daemon
Then, restart sendmail:
/etc/init.d/sendmail restart

Lister un répertoire de manière sélective

Le plus souvent on utilisera grep
$ ls -l backup/2007 | grep Feb

mais parfois il peut s’aveer plus utile d’utliser awk
$ ls -l backup/2007 | awk ‘$6 == “Feb”‘

create a directory tree

If you want to quick, don’t forget to use the ‘-p’ option

wrong way:
[john@host john]$ mkdir dev
[john@host john]$ cd dev
[john@host dev]$ mkdir first
[john@host dev]$ cd first
[john@host first]$ mkdir alpha
[john@host dev]$ mkdir second
[john@host dev]$ ll
[john@host dev]$ cd ..
[john@host john]$ mkdir prod
[john@host john]$ cd prod
[john@host prod]$ mkdir first
[john@host prod]$ mkdir second

good way:
[john@host john]$ mkdir -p dev/first/alpha

best way:
[john@host john]$ mkdir -p dev/{first/alpha,second},prod/{first,second}