Fast Facts
View System Domain
hostname -d
Change System Hostname
Ubuntu/Debian
- Install gksu Ubuntu: sudo apt-get install gksu
- Run the following: Gksudo gedit /etc/hostname
- Enter root password
- Edit the hostname file and save
- Close all windows and reboot
CentOS/RedHat
RedHat based system use the file /etc/sysconfig/network to read the saved hostname at system boot. This is set using the init script /etc/rc.d/rc.sysinit/etc/sysconfig/network:
NETWORKING=yes
HOSTNAME=”plain.domainname.com”
GATEWAY=”192.168.0.1?
GATEWAYDEV=”eth0?
FORWARD_IPV4=”yes”
Restart Network Interface
sudo /etc/init.d/networking restart
Disk I/O Tool
vmstat 3 # Lists current input/output demands on the hard drive
View List of User Accounts
cat /etc/passwd
or getent passwd