V4/man/man1/passwd.1

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.th PASSWD I 9/1/72
.sh NAME
passwd \*- set login password
.sh SYNOPSIS
.bd passwd
name password
.sh DESCRIPTION
The
.it password
is placed on the given login name.
This can only be done by the person
corresponding to the login name or by the super-user.
An explicit null argument ("") for the password
argument will remove
any password from the login name.
.sh FILES
/etc/passwd
.sh "SEE ALSO"
login(I), passwd(V), crypt(III)
.sh BUGS