Changing hostname without rebooting Linux server

Here the steps for changing the hostname in Linux (Redhat / CentOS / Fedora) without rebooting the server
For Suse Linux Enterprise Server Please refer this Article

First you need to find out your current hostname:

# hostname

Now, Edit

For example, I need to assign it hostname as

To do this, I have edited /etc/hosts as follows.
# Do not remove the following line, or various programs
# that require network functionality will fail. localhost.localdomain localhost ftpsrv


To change servers hostname to, change the file as follows.

# cat /etc/sysconfig/network


Now Type the following command in Terminal, 

# hostname

#service syslog restart

Now, You should logout and login back to see the cahnges

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