CentOS change hostname

Print the network node hostname

# uname -n
localhosts.localdomain

Edit /etc/sysconfig/network

# nano /etc/sysconfig/network

1 2 3

NETWORKING=yes NETWORKING_IPV6=no HOSTNAME=zacker

Edit /etc/hosts

# nano /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               zacker
::1             localhost6.localdomain6 localhost6

# /etc/init.d/network restart