adding users? + edditing files

just_me_then · 01-02-2007, 06:42 AM

Hi.

Just wondering if there is a way to set a uses passwords at the same time as creating the user. At the moment i do:

useradd testuser -p password

But this does not work! I still have to passwd testuser and set there password that way! Is there a way round this?

Also it there a way i can set a new users shell to be /sbin/nologin (no have to add -s each time?)

Lastly i was wondering is there as way i can add a line onto the end of a file without have to open it?

- Thanks

namit · 01-02-2007, 07:06 AM

do you not just put the -p before the testuser?

just_me_then · 01-02-2007, 07:09 AM

Apparently not! Tried it both sides, but still does not work.

bigrigdriver · 01-02-2007, 07:10 AM

If you look at the man page for 'useradd', you will see that the -p option wants the encrypted form of the password as generated by crypt.

Quote:

-p, --password password
Encrypted password as returned by crypt(3) for the new account. The default is to disable the account.

So, you might try passing the output of crypt to the useradd command:

useradd testuser -p `crypt password`

Note the back ticks around 'crypt password'.

just_me_then · 01-02-2007, 07:49 AM

Quote:

you might try passing the output of crypt to the useradd command:

useradd testuser -p `crypt password`

This looks like the way forwords!
. . . . I asume i need to run a seprate comand to get the crypt password first? I looked at the man page for crypt and it sugest it need a list of other options. How do i know which to use for this?

- Thanks

colucix · 01-02-2007, 08:09 AM

Quote:

Originally Posted by just_me_then

Lastly i was wondering is there as way i can add a line onto the end of a file without have to open it?

- Thanks

To answer to your last question, a simple command is

Code:

printf "\n" >> filename

bigrigdriver · 01-02-2007, 08:33 AM

Quote:

I asume i need to run a seprate comand to get the crypt password first?

No. The reason for the backticks around 'crypt password' is the backticks will cause the command 'crypt' to be run with 'password' as input to crypt. The return from running that command (the encrypted password) is then passed to the -p option.

just_me_then · 01-02-2007, 08:40 AM

Ok, so i ran: useradd -p `crypt testpassword` testuser

and it just through an error back at me
-bash: crypt: command not found

Maybe i should just give it a good kick?!

(thank for all your help so far)

just_me_then · 01-02-2007, 08:42 AM

tabbing shows me cryptsetup but not crypt as an option? Does this help?

marozsas · 01-02-2007, 08:51 AM

crypt is a system call, not an user command. Note the manual section.

I have a post about this subject. read it:

http://www.linuxquestions.org/questi...ighlight=crypt