Linux grpconv command
Linux grpconv (group convert to shadow password) command to enable the group projection password.
Linux system users and groups passwords are stored in the passwd and group files / etc directory under. Due to the required operating system, anyone able to read them, causing flaws in security. Projection password change the password within the file exists / inner shadow and gshadow files etc directory, only allows the system administrator to read, while the original password is replaced by "x" character. The projector password can turn on or off at any time, you can simply open the group will be able to execute instructions grpconv projection password.
grammar
grpconv