I forgot the linuxroot password. how can I find it?

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I haven't played LINUX for a long time. Today, my company's server is down, so I went in and checked it out. The bad thing is that I forgot the password of my company's server or LINUX. I am in trouble, what should we do? I studied it and found out how to find it one morning. The following describes how to find it in three ways:

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Linux root password retrieval method 1

　　

Step 1: When using grub to boot the system: when the grub screen appears, use the up/down key to select the one that you usually start linux (do not select dos), and then press the e key

　　

Step 2: use the up and down keys again to select the one you usually start linux (similar to kernel/boot/vmlinuz-2.4.18-14 ro root = LABEL =/), and then press the e key

　　

Step 2: modify the command line you see and add single. The result is as follows:

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

　　

Step 2: press enter to return, and then press the B key to start, you can directly enter the linux command line.

　　

Step 2: run the following command "vi/etc/shadow" to delete the contents of the first line, that is, the line starting with "root", "root", and "next, the first line is similar to root ::...... save

Vi/etc/shadow

　　

Step 2: restart reboot. the root password is blank.

 

Linux root password retrieval method 2

　　

Step 2: use passwd root to change the status of a single user.

　　

Step 2: use the CD to boot the system and run linux rescue to connect the original/partition as follows:

Cd/mnt mkdir hd mount-t auto/dev/hdaX (original/partition ID) hd cd hd chroot./passwd root

 

Linux root password retrieval method 3

　　

Step 2: use passwd root to change the status of a single user.

　　

Step 2: use the CD to boot the system and run linux rescue to connect the original/partition as follows:

Cd/mnt mkdir hd mount-t auto/dev/hdaX (original/partition ID) hd cd hd chroot./passwd root

　　

Step 2: Remove the local hard disk and mount it to other linux systems,