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Full Discussion: '!!' in /etc/shadow
Top Forums UNIX for Dummies Questions & Answers '!!' in /etc/shadow Post 302477109 by vistastar on Friday 3rd of December 2010 09:26:03 AM
Old 12-03-2010
'!!' in /etc/shadow

I notice there are '*'s and '!!'s in my /etc/shadow file.
And I know these are for preventing login. But what are the differences among '*', '!' and '!!' ?
THX!
Code:
mail:*:14789:0:99999:7:::
uucp:*:14789:0:99999:7:::
...
dbus:!!:14919::::::
rpc:!!:14919:0:99999:7:::
...
jone:!!:14946:0:99999:7:::

PS:"jone" is a user added by useradd command.
 

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lchage(8)						      System Manager's Manual							 lchage(8)

NAME
lchage - Display or change user password policy SYNOPSIS
lchage [OPTION]... user DESCRIPTION
Displays or allows changing password policy of user. OPTIONS
-d, --date=days Set the date of last password change to days after Jan 1 1970. -E, --expire=days Set the account expiration date to days after Jan 1 1970. Set days to -1 to disable account expiration. -i, --interactive Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration. -I, --inactive=days Disable the account after days after password expires (after the user user is required to change the password). -l, --list Only list current user's policy and make no changes. -m, --mindays=days Require at least days days between password changes. Set days to 0 to disable this checking. -M, --maxdays=days Require changing the password after days since last password change. Set days to 99999 to disable this checking. -W, --warndays=days Start warning the user days before password expires (before the user is required to change the password). EXIT STATUS
The exit status is 0 on success, nonzero on error. libuser Jan 12 2005 lchage(8)
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