topic Re: Setting variable for remote ssh connection. in Operating System - HP-UX

Setting variable for remote ssh connection.

ankurp — Wed, 08 Jun 2005 05:57:08 GMT

Hi friends,
Need help in executing the following.

i=server_name
group=sysadmin

ssh $i 'useradd -g $group -d /opt/home/x32810 -f 30 -s /bin/sh -c test -m x32810'

This is result i get.
Group -d specified with -g does not exist

pls. help

rgds
Ankur

Re: Setting variable for remote ssh connection.

Suraj Singh_1 — Wed, 08 Jun 2005 06:07:25 GMT

You need to make sure that group 'sysadmin' exists in machine 'server_name'

ssh $i 'cat /etc/group|cut -f 1 -d :|grep sysadmin'

Regards

Re: Setting variable for remote ssh connection.

Muthukumar_5 — Wed, 08 Jun 2005 06:16:35 GMT

Is sysadmin group existing in server_name machine? check with /etc/group file.

Is group name getting effect in remote machine? Try to check it as,
ssh $i 'echo $group'

hth.

Re: Setting variable for remote ssh connection.

ankurp — Wed, 08 Jun 2005 06:27:52 GMT

Thanks friends for replying,
Actually the problem is with the passing of variable.
i need to know if the single quote is enough to pass $grp variable.
ssh $i 'useradd -g $group -d /opt/home/x32810 -f 30 -s /bin/sh -c test -m x32810'
Group -d specified with -g does not exist

Its is not takin the $group variable

waitin

rgds
Ankur

Re: Setting variable for remote ssh connection.

Muthukumar_5 — Wed, 08 Jun 2005 06:30:43 GMT

Yes. It won't. Bcas local varibles will not be identified by remote machine. Even though if you try locally, that shell will not identify this.

You can do one thing as,

put group=sysamin in /etc/sshrc remote machine or $HOME/.ssh/rc file.

It will work.

hth.

Re: Setting variable for remote ssh connection.

ankurp — Wed, 08 Jun 2005 07:02:59 GMT

hi ,

i m doin this to create users and groups remotely from one server to another.
So need to use variables for groups and users.

rgd
Ankur

Re: Setting variable for remote ssh connection.

Doug O'Leary — Wed, 08 Jun 2005 07:32:38 GMT

Oh my god, people, this is simple shell expansion!

The reason $group isn't getting sent is because you have single quotes around the command line. In this case, you actually don't even need quotes but if you want them, use double quotes. The shell will then expand all variables and send the command to ${i}...

You don't have to do any of the things the previous posts were mentioning...

To script this whole thing, create a text file with contents like:

host1 user1 group1
host1 user2 group1
host2 user3 group2
host2 user4 group2
host2 user5 group3
...
host# user# group#

cat ${file} | while read host user group
do
ssh -l root ${host} /usr/sbin/useradd -g ${group} -d /opt/home/${user} -f 30 -s /bin/ksh -c test -m ${user}
done

HTH;

Doug

Re: Setting variable for remote ssh connection.

Gopi Sekar — Wed, 08 Jun 2005 07:57:42 GMT

you need to double quote the command line:

ssh $i "useradd -g $group -d /opt/home/x32810 -f 30 -s /bin/sh -c test -m x32810"

shell does not expand any variables if it is surrounded by single quote('). you should use double quote to expand them

Hope this helps,
Gopi

Re: Setting variable for remote ssh connection.

Suraj Singh_1 — Wed, 08 Jun 2005 08:30:41 GMT

Oh yes,

You must use double quotes (") and not single quotes.

Tested in one of my machines, and it works!!

Regards

Re: Setting variable for remote ssh connection.

Devesh Pant_1 — Wed, 08 Jun 2005 23:39:05 GMT

Ankur,
according to what I tested on my servers you can get rid of the single quotes and you are all set.

thanks
Devesh

Re: Setting variable for remote ssh connection.

ankurp — Thu, 09 Jun 2005 00:11:23 GMT

That worked friends.
Actually the double quotes of comment was also creating problems.
I m proud to be associated with this forum.

Thanks again.

rgds
Ankur

Re: Setting variable for remote ssh connection.

ankurp — Thu, 09 Jun 2005 00:12:38 GMT

This is what works
ssh $i " useradd -u 400 -g ${grp} -d /opt/home/x32810 -f 30 -s /bin/sh -c 'test user' -m xtest "

bye
Rgds
Ankur