Bash processing tips needed for listing passwordless users.

green_dood · 05-14-2009, 11:10 AM

Hi there guys:

I was asked to list passwordless or locked accounts in a fedora system. As far as I know, fedora or RH dont allow passwordless accounts (the system locks the account Edit: ... unless you set passwd -d :-P ), so I might show info about locked accounts.

I am totally aware that I could do a grep or an awk searching for "!!" or "", but my people is asking me to check against passwd -S (which prints info of accounts). The thing, is that in Solaris you can check with passwd -a -s all the users, but in Linux I couldnt find anything similar.

The question here is what approach do you reccomend for passing, say , the list of users ( like the output of awk searching only user names) to the command passwd -S one by one?

Any comments?

Thanks for your support!

eco · 05-14-2009, 11:19 AM

a 'man passwd' gave me:

# passwd -aS

Oups, hit enter a bit too quick...

a = all,

You should be able to work it out from there

green_dood · 05-14-2009, 12:03 PM

Quote:

Originally Posted by eco

a 'man passwd' gave me:

# passwd -aS

Oups, hit enter a bit too quick...

a = all,

You should be able to work it out from there

[root@satellite ~]# passwd -aS
passwd: bad argument -aS: unknown option

Sorry, tried it before (I even used passwd -a -S ). Which version of fedora are you using? Mine is Fedora 11

eco · 05-14-2009, 04:54 PM

I am running Kubuntu with the password binary version 4.1.1

Code:

$ dpkg -l|grep passwd
ii  base-passwd                                3.5.21                                   Debian base system master password and group
ii  kdepasswd                                  4:4.2.2-0ubuntu4                         password changer for KDE 4
ii  passwd                                     1:4.1.1-6ubuntu6                         change and administer password and group dat

what does the man page say? Maybe you have an older version but I'm sure you could loop through the passwd file and check them individually with the 'passwd -S' command

green_dood · 05-15-2009, 12:13 PM

Yep, I needed to run a little script to first get all the users and then pass them to passwd -s

Code:

USERS="$(cut -d: -f 1 /etc/passwd)"
for u in $USERS
do
passwd -S $u | grep -Ew "NP" > /dev/null
if [ $? -eq 0 ]; then
myUID=`awk -F":" "/$u/"'{ print $3}' /etc/group`
myGroups=`awk -F":" "/$myUID/"'{ print $1}' /etc/group`
echo Username: $u , UID: $myUID, GROUPS: $myGroups >>$reportFile
fi
done