PUBLIC MARKS from camel with tags apache & mail

Many times, you want to execute a command not only on one server, but also on several servers. For example, find out * Version of kernel * Version of Apache web server * Update static html or images files on all web servers via rsync * Find out user information, server information, memory usage etc * Security/patch checking tentakel I have already covered how to execute commands on multiple Linux or UNIX servers via shell script. The disadvantage of script is commands do not run in parallel on all servers. However, several tools exist to automate this procedure in parallel. With the help of tool called tentakel, you run distributed command execution. It is a program for executing the same command on many hosts in parallel using ssh (it supports other methods too). Main advantage is you can create several sets of servers according requirements. For example webserver group, mail server group, home servers group etc. The command is executed in parallel on all servers in this group (time saving). By default, every result is printed to stdout (screen). The output format can be defined for each group.

Un ensemble de nouveaux tutoriels a été mis en ligne cette semaine pour inaugurer une nouvelle thématique : L'administration de serveurs dédiés. En effet, les hébergements dédiés sont devenus monnaie courante, et il est fréquent de devoir plonger les mains dans le cambouis. Ces tutoriels ont pour but de servir de feuille de route à la mise en place d'un serveur web sous Apache assorti de PHP et MySQL, ainsi que de services mail et ftp. Des conseils en matière de monitoring, de sauvegarde et de sécurité complètent le tour d'horizon. Deux d'entre eux abordent également de façon rapide l'installation du webmail Roundcube et du panel de gestion DTC pour contrôler plus efficacement les services évoqués précédemment dans le cas d'un hébergement multi-domaines.

This tutorial shows how to set up a Debian Etch (Debian 4.0) based server that offers all services needed by ISPs and hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Courier POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the 32-bit version of Debian Etch, but should apply to the 64-bit version with very little modifications as well.