CentOS6.8 modifying host names (1)

1. Temporarily modify the host name to display the hostname:
[Email protected]:~$ hostname
Master

Modify Host Name:
[Email protected]:~$ sudo hostname hadoop
[Email protected]:~$ hostname
Hadoop PS: The above changes are only temporary changes, after the restart is back to the original. 2. Permanently modify the host name

Permanently modified on Redhat/centos

[Email protected] ~]# cat/etc/sysconfig/network
Networking=yes
Hostname=localhost.localdomain
gateway=192.168.10.1

Modify the hostname entry for the network. The point is preceded by the hostname, and the dot is followed by the domain name. No point is the host name.

[Email protected] ~]# vi/etc/sysconfig/network

Networking=yes
Networking_ipv6=no
Hostname=master

This is permanently modified and takes effect after reboot. Currently I do not know how to take effect immediately.

To take effect immediately, you can use the first method at the same time.

There is also a change:

/etc/hosts

127.0.0.1 Localhost.localdomain

The part behind the 127.0.0.1.

modified on Deb/ubuntu :

Hostname
Localhost.localdomain

sudo vi/etc/hostname

Fill in the/etc/hostname directly with hostname as Master

[Email protected]:~$ cat/etc/hostname
localhost

After the reboot, the prompt becomes.

[Email protected]:~$

If you do not want to restart, use the hostname name order.

3. Other modification methods

Modify Kernel.hostname with Sysctl

View:

[Email protected]:~$ sysctl kernel.hostname
Kernel.hostname = Master

Modify:

[Email protected]:~$ sudo sysctl kernel.hostname=hadoop
Kernel.hostname = Hadoop

Re-opening the shell becomes the following hostname Hadoop

[Email protected]:~$

CentOS6.8 modifying host names (1)