Several methods of modifying hostname in Linux

There are several ways to modify hostname

1:hostname Db-server--effective immediately after operation (new session takes effect), but changes are lost after the system restarts

2:echo db-server >/proc/sys/kernel/hostname--takes effect immediately after operation (new session takes effect), but changes are lost after the system restarts

3:sysctl Kernel.hostname=db-server--effective immediately after operation (new session takes effect), but changes are lost after the system restarts

4: Modify the hostname variable under/etc/sysconfig/network--requires a reboot to take effect, permanent modification.

It is important to note that the original host configuration is affected after the hostname has been modified, and the access to this opportunity fails with the original hostname

Modify/etc/hosts files according to actual needs

Several methods of modifying hostname in Linux