Linux Learning Notes (vii)---CentOS7 single-user mode

In CentOS7, there is a single-user mode, similar to the security mode under Windows. If we forget the root password, we can reset it in single-user mode.
Note: This operation must be done in front of the server and cannot be operated remotely.
1. Restart the machine, in the system login Select interface, press the arrow key. Select the entry that is normally logged in, and then press the E key as shown:

2. Enter the grub editing interface. linux16 this line of RO modified to RW init=/sysroot/bin/sh.

3. Press Ctrl+x to enter single-user mode

4. After logging in, enter the following command:
chroot/sysroot/#切换到原系统
Lang=en #设置显示语言
passwd Root #修改root密码
Touch/.autorelabel #如果之前系统关闭selinux, this can not be done.

5. Reboot the system and login with the new password.

Linux Learning Notes (vii)---CentOS7 single-user mode