A basic server setup guide for people from debian to CentOS.
Software
yum is apt-get/aptitude on CentOS.
Remove not neccessary software:
yum grouplist
yum groupremove <wildcards>
yum list installed
yum remove <wildcards>
Upgrade system: (equivalent to apt-get update && apt-get upgrade on debian)
yum update
Add more packages:
http://wiki.centos.org/AdditionalResources/Repositories/RPMForge
Unlike Debian, Centos’s official package repo is very limited.
Services
Check what is running:
chkconfig --list |grep '3:on' |awk '{print $1}' |sort
Use chkconfig <service> off to disable unnecessary services.
chkconfig is included as default in Centos.In Debian, you can install it via apt-get install chkconfig,though Debian people are likely to use sysv-rc-conf instead.
Hostname
Make sure your /etc/hosts file have a line like:
127.0.0.1 <your-hostname>.example.com <your-hostname> localhost.localdomain localhost
And /etc/sysconfig/network have a line like:
HOSTNAME=your-hostname.example.com
Then run hostname <your-hostname>.example.com
Debian doesn’t use /etc/sysconfig/network.In Debian, you change hostname in /etc/hostname:
echo 'your-hostname' > /etc/hostname
Debian prefers to not include the example.com part.
SSH
Same to Debian.
Firewall
CentOS may enable iptables by default.You may want to disable it via service iptables stopor /etc/init.d/iptables stop.And disable its startup at boot time via chkconfig.
If you want to mess up with it, its configuration file is located at/etc/sysconfig/iptables, different to Debian.
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