Recover /etc/passwd file in Linux

/etc/passwd is deleted accidently, Recover the file.

There is a backup file of /etc/passwd in same directory with name passwd-

$ sudo cp /etc/passwd- /etc/passwd
$ sudo chmod 644 /etc/passwd

Lock the file using

$ sudo pwck -q

If you are not root user and do not use sudo before pwck -q, it will give error

pwck: cannot lock /etc/passwd; try again later.