how to create user in linux

phoenix_fei · 11-26-2004, 04:03 AM

hello everyone :
i want to know how to create user ,but you do not do with shell command,i try to update the file in /etc/passwd and /etc/group in order to create user,but the user who i create do not login. i want to know why?

thanks

hk_linux · 11-26-2004, 04:30 AM

wat abt /etc/shadow?

phoenix_fei · 11-26-2004, 04:32 AM

can you expain "wat abt/etc/shadow";
thanks

hk_linux · 11-26-2004, 04:48 AM

There is a file called /etc/shadow, which is accessible only by root. The file will contain the encrypted password and other user info. You need to have an entry there for the user to log in. After you put an entry, use the "passwd" command to change the password of the user.

phoenix_fei · 11-26-2004, 05:08 AM

i have to update it,but not login it .

phoenix_fei · 11-26-2004, 05:11 AM

hello

are you tell me if i want to create user with sys_call,
how to it .
thanks

jlliagre · 11-26-2004, 05:27 AM

phoenix_fei, can you show us the lines you added in the /etc/passwd, /etc/shadow and /etc/group files for us to be able to find out what's wrong ?

AnanthaP · 11-26-2004, 10:13 AM

`adduser`.

End

Present · 11-27-2004, 11:47 AM

try this as su:

su <super user password>
adduser -g <groupname> <username>
passwd <username> <password>

like this..

Code:

su WiaasdQ1
adduser -g users bobo
passwd bobo BiMbO

that should make the needed entries...

then i would suggest making a directory in /home for them with permissions drwxr-xr-x:

edited:
for clairification...
su <super user password>
mkdir <desired /home directory>
chmod <permission> <desired /home directory>
example below:
/edited

Code:

su WiaasdQ1
mkdir /home/bobo
chmod 755 /home/bobo

oh ya, don't forget to make bobo owner and set group to users

that should take care of it.

to add a long list of users, consult other threads like this <click here> thread for making a script...

hope that helps,
pres

jlliagre · 11-27-2004, 12:24 PM

Quote:

su WiaasdQ1
mkdir /home/bobo
chmod 755 /home/bobo

That script isn't going to work, the new user isn't allowed to create a directory in /home, this should be done by root, and chowned to WiaasdQ1.

crabboy · 11-27-2004, 01:53 PM

Moving to Linux-General.

Present · 11-27-2004, 02:01 PM

Quote:

Originally posted by jlliagre
That script isn't going to work, the new user isn't allowed to create a directory in /home, this should be done by root, and chowned to WiaasdQ1.

the example WAS su; "WiaasdQ1" was an example of a possible su password ;-)

phoenix_fei · 11-27-2004, 11:31 PM

hello eveyrone,i know that you say.but i want t o achieve with C++ in order to create user.what i should do ?

thanks .please reply me?

Present · 11-27-2004, 11:52 PM

perhaps start a new thread and post a subject line that says it all, saving potential contributers from having to read a bunch of posts now unrelated to your objective.

try a subject like this maybe:

how to create multiple users using c++?

just a suggestion, and good luck

wmakowski · 11-28-2004, 12:56 AM

There are a few functions that may help. Using man check out putpwent and shadow. This will tell you what header files and functions to use for adding entries to /etc/passwd and /etc/shadow. As hk_linux mentioned there must be an entry in /etc/shadow to allow a user to login.

Bill