CentOS and Ubuntu Modify host names

Centos

1. Perform hostname to view host name

2, hostname + hostname makes the hostname need to be modified to take effect immediately, but the next reboot will be invalid, so we need to perform the third step

3, Vim/etc/sysconfig/network (red flag is required to change the hostname)

4, exit the system re-login, that is, effective

Ubuntu

1. Perform hostname to view host name

2, hostname + hostname makes the hostname need to be modified to take effect immediately, but the next reboot will be invalid, so we need to perform the third step

3, Vim/etc/hostname in the file need to set the host name can be

4, exit the system re-login, that is, effective

CentOS and Ubuntu Modify host names