[ncolug] Re: /etc/shadow !! in password file
- From: Mike <bellyacres@xxxxxxxxx>
- To: ncolug@xxxxxxxxxxxxx
- Date: Thu, 20 Jun 2013 13:03:23 -0400
On 06/20/2013 10:49 AM, M. Knisely wrote:
I know that the ! can mean that the password field is blank or
disabled... what I need to do is to use the passwd command to get it
to write a !! in the password field of /etc/shadow.
Any suggestions?
Mike K.
PS: Yes, I have googled it... extensively.
PPS: Yes, I know I can, as root, edit /etc/shadow and do it manually.
Trust me when I say that there are reasons I don't want to do that
unless I absolutely have to.
Here is a way....
mike@tightrope:~$ apropos passwd
chgpasswd (8) - update group passwords in batch mode
chpasswd (8) - update passwords in batch mode
Crypt::PasswdMD5 (3pm) - Provides interoperable MD5-based crypt() functions
exim4_passwd (5) - Files in use by the Debian exim4 packages
exim4_passwd_client (5) - Files in use by the Debian exim4 packages
gpasswd (1) - administer /etc/group and /etc/gshadow
grub-mkpasswd-pbkdf2 (1) - generate hashed password for GRUB
lppasswd (1) - add, change, or delete digest passwords.
makepasswd (1) - generate and/or encrypt passwords
mkpasswd (1) - Overfeatured front end to crypt(3)
mksmbpasswd (8) - formats a /etc/passwd entry for a smbpasswd file
pam_localuser (8) - require users to be listed in /etc/passwd
passwd (1) - change user password
passwd (1ssl) - compute password hashes
passwd (5) - the password file
smbpasswd (5) - The Samba encrypted password file
smbpasswd (8) - change a user's SMB password
update-passwd (8) - safely update /etc/passwd, /etc/shadow and /etc/group
mike@tightrope:~$
mike@tightrope:~$ man chpasswd
mike@tightrope:~$ script
Script started on Thu 20 Jun 2013 12:42:53 PM EDT
mike@tightrope:~$ sudo adduser iputz
[sudo] password for mike:
Adding user `iputz' ...
Adding new group `iputz' (1001) ...
Adding new user `iputz' (1001) with group `iputz' ...
Creating home directory `/home/iputz' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for iputz
Enter the new value, or press ENTER for the default
Full Name []: Ima Putz
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Other []:
Is the information correct? [Y/n]
mike@tightrope:~$ sudo grep iputz /etc/passwd /etc/shadow
/etc/passwd:iputz:x:1001:1001:Ima Putz,,,:/home/iputz:/bin/bash
/etc/shadow:iputz:$6$vrgqeJNq$GF2OckxPdW5eJvM/Tu3avSBN73tT10e5VFhoH6MiRGcHOpEumuMsbXOOrFsh0Gr0N3BLddMzYc5bM8ggvFi4M0:15876:0:99999:7:::
mike@tightrope:~$ echo 'iputz:!!' | sudo chpasswd -c NONE
sudo grep iputz /etc/passwd /etc/shadow
/etc/passwd:iputz:x:1001:1001:Ima Putz,none,,:/home/iputz:/bin/bash
/etc/shadow:iputz:!!:15876:0:99999:7:::
mike@tightrope:~$ exit
Script done on Thu 20 Jun 2013 12:51:23 PM EDT
mike@tightrope:~$
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