copy with locking the given file to the password or group file
cppw [-h] [-s] password_file cpgr [-h] [-s] group_file
cppw and cpgr will copy, with locking, the given file to /etc/passwd and /etc/group, respectively. With the -s flag, they will copy the shadow versions of those files, /etc/shadow and /etc/gshadow, respec‐ tively. With the -h flag, the commands display a short help message and exit silently.
cppw and cpgr were written by Stephen Frost, based on vipw and vigr written by Guy Maor. 7 Apr 2005 CPPW(8)