Projection password used to close the group
grpunconv command is used to turn off the projection password of the group. It will save the password from the gshadow file back to the group file.
grpunconv
Not closed
cat /etc/gshadow | grep cdy
cdy:123456::
Turn off shadow password
cat /etc/gshadow
cat: /etc/gshadow: No such file or directory
Check that the password has been copied to /etc/group
.
cat /etc/group | grep cdy
cdy:123456:1000: