Practical Skills: three methods to retrieve the Linux Root Password

1. Use passwd root to change the status of a single user;

1. lilo

When lilo appears: Enter linux single

Lilo: linux single

Enter the linux Command Line

# Vi/etc/shadow

Delete the content in the first line, that is, the content before "root:" and "Next", starting with "root". The first line is similar to "root:..." And save

# Reboot restart. the root password is blank.

2. grub

When the grub screen appears, use the up/down key to select the item that usually starts linux, and then press the e key.

Use the up/down key again to select the item that usually starts linux, and then press the e key.

Modify the currently seen command line and add single. The result is as follows:

Kernel/boot/vmlinuz-2.4.18-14 single ro root = LABEL =/

Press enter to return, and then press the B key to start, you can directly enter the linux Command Line

# Vi/etc/shadow

Delete the content in the first line, that is, the content before "root:" and "Next", starting with "root". The first line is similar to "root:..." And save

# Reboot restart. the root password is blank.

2. Install the CD boot system and run the linux rescue status to connect the original/partition. The procedure is as follows:

Cd/mnt mkdir hd mount-t auto/dev/hdaX hd cd hd chroot./passwd root

3. Remove the hard disk of the Local Machine and mount it to other Linux systems. The method is the same as that of the second one.