How to rename Linux Hostname

CentOS:

Logon to server via putty

Type      vi /etc/hosts      Enter

Press     I

Rename machine and Press escape press Shift colon

Type   wq!      Enter

Type   vi /etc/sysconfig/network   enter

Press i

Rename machine and Press escape press Shift colon

Type   wq!      Enter

service network restart

chkconfig network on

If you want to reboot the server type    init  6

 

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Ubuntu:

sudo vim /etc/hostname

Press     I

Rename machine and Press escape press Shift colon

Type   wq!      Enter

Sudo reboot

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