|Linux & Unix Commands - Search Man Pages
passwd - change login password
passwd [ name ]
This command changes (or installs) a password associated with the user name (your own name
The program prompts for the old password and then for the new one. The caller must supply
both. The new password must be typed twice, to forestall mistakes.
New passwords must be at least four characters long if they use a sufficiently rich alpha-
bet and at least six characters long if monocase. These rules are relaxed if you are
Only the owner of the name or the super-user may change a password; the owner must prove
he knows the old password.
login(1), passwd(5), crypt(3)
Robert Morris and Ken Thompson, Password Security: A Case History
All times are GMT -4. The time now is 01:55 PM.