CentOS Modify Host Name

Latest article: Virson ' s Blog1. Temporarily modify hostname

Address: http://www.cnblogs.com/mawanglin2008/p/3530790.html

Display host Name:

[Email protected]:~$ hostnamelocalhost

Modify Host Name:

[Email protected]:~$ sudo hostname orcl1[email protected]:~$ HOSTNAMEORCL1

2. Permanently modify the host name

The above modification is only a temporary change, after the restart is back to the original.

Step 1:

Modify the hostname in/etc/sysconfig/network

Vi/etc/sysconfig/networkhostname=localhost.localdomain  #修改localhost. Localdomain to ORCL1

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.

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.

Step 2:
Modify the/etc/hosts file

vi/etc/hosts127.0.0.1    localhost.localdomain  #修改localhost. Localdomain to ORCL1

Shutdown-r now    #最后, restart the server.

--------------------------------------------------------------------------------------------------------------- -----------------------------------------

Address: http://www.centoscn.com/CentOS/help/2015/0206/4640.html

Permanently modified on Edhat/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]:~$

CentOS Modify host name