topic Re: Useradd script in Operating System - HP-UX

Useradd script

mtfahey — Thu, 26 Apr 2007 14:34:12 GMT

I need to add about 50 users and would like to do it with a shell script. These users are on other servers. I need to keep their UID the same on all servers. They can all have the same password and force them to change it on log in. HP-UX 11.23, korn shell. Points to be awarded!

Re: Useradd script

spex — Thu, 26 Apr 2007 14:45:00 GMT

1) Where are you pulling the list of users/UIDs from (e.g. multiple copies of /etc/passwd on different servers, a single textfile, etc.)?
2) Is it safe to assume that a user's UID is unique?

Re: Useradd script

mtfahey — Thu, 26 Apr 2007 14:51:45 GMT

I'm pulling the information from /etc/passwd on the master server. All the UIDs are unique.

Re: Useradd script

mtfahey — Thu, 26 Apr 2007 15:11:53 GMT

Just to add -> I would like to create a text file from the master server and use the information from it to create the users on another server.

Re: Useradd script

Peter Nikitka — Thu, 26 Apr 2007 15:25:59 GMT

Hi,

first make sure, that no new UID is already present in /etc/passwd of the new server.
Now extract the lines of the requested users from the original passwd to a file e.g. pw2add.
If the HOME will be different, modify pw2add.

Having transformed the file to the new system, it depends on whether you use plain passwd authentication or the tcb (trusted system).
For plain passwd this is enough:
cp /etc/passwd /etc/passwd.1
cat pw2add >>/etc/passwd
awk -F: '{print $3,$4,$6}' pw2add |
while read uid gid dir
do
mkdir -p $dir && chown $uid:$gid $dir
done

If your system is trusted, let us know.
Just appending to /etc/passwd is not enough in that case.

mfG Peter

Re: Useradd script

mtfahey — Thu, 26 Apr 2007 16:35:59 GMT

To extract the users I need from /etc/passwd I was going to use the following command:

cat /etc/passwd |awk -F":" '$3 >= 1100 && $3 <= 2999 {print $1 ":" $2 ":" $3 ":"$4 ":" $5 ":" $6 ":" $7}' > pw2add

Re: Useradd script

Peter Nikitka — Fri, 27 Apr 2007 03:48:13 GMT

Hi,

the command you want to use is possible ...
>> cat /etc/passwd |awk -F":" '$3 >= 1100 && $3 <= 2999 {print $1 ":" $2 ":" $3 ":"$4 ":" $5 ":" $6 ":" $7}' > pw2add
<<
... but I want to add some comments:

- No need for the 'cat' - awk can open files by itself:
awk -F":" '$3 >= 1100 && $3 <= 2999 {print $1 ":" $2 ":" $3 ":"$4 ":" $5 ":" $6 ":" $7}' /etc/passwd >pw2add
- Having exactly seven fields in the input file, there is no need to numerate the all explictly - the action can be simplified to
... {print $0} ...
wjich is identical to
... {print} ...
which is the default, so this is equivalent:
awk -F: '$3 >= 1100 && $3 <= 2999' /etc/passwd >pw2add

mfG Peter

Re: Useradd script

mtfahey — Fri, 27 Apr 2007 06:30:59 GMT

Yeah, I just read that in the book I just bought. Thank you very much!

Re: Useradd script

mtfahey — Tue, 01 May 2007 08:48:29 GMT

Thank you all for assistance.

Re: Useradd script

mtfahey — Tue, 01 May 2007 08:49:01 GMT

thanx