How to view and modify host name under Linux

This article mainly shows you how to view and modify the host name under Linux. The content is simple and easy to understand. It is clearly organized. I hope it can help you solve your doubts. Let Xiaobian lead you to study and learn how to view and modify the host name under Linux.

Query host name: uname -n

hostname

[root@oldboy ~]# uname -n oldboy [root@oldboy ~]# hostname oldboyLinux operating system hostname is a kernel variable, you can use the hostname command to view the local hostname. It can also be viewed directly at cat /proc/sys/kernel/hostname.

[root@oldboy ~]# hostname oldboy [root@oldboy ~]# cat /proc/sys/kernel/hostname oldboy The above two outputs are the same.

Modify the hostname of the Linux system at runtime, that is, there is no need to restart the system

The hostname command can set the hostname of the system, which takes effect immediately after running, but the changes will be lost after the system restarts. If you want to permanently change the hostname of the system, you must modify the relevant settings file.

Set Host Name: Temporarily Effective:

The default is to display host names

Set hostname: hostname hostname

hostname Display and set hostname

Permanently effective:

vim /etc/sysconfig/network; change hostname to expected value; save and exit.

/etc/sysconfig/network

vim /etc/hosts; modify or add hostname, i.e. the IP address corresponding to the hostname. Save and exit.

/etc/hosts

service network restart; network restart.

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