To get total number of users and their groups in remote unix machine

Ekamjotsingh · 02-26-2014, 01:39 PM

Hi All

I am trying to do ssh to different server and on the remote server for each user trying to get groups of that user but i am not getting the required
result.

ssh acncde@10.129.192.137 "for i in $( cat /etc/passwd| cut -d: -f1);do groups $i done;exit" >>abc.txt

only names are getting shown but not there usernames.

suicidaleggroll · 02-26-2014, 01:42 PM

Use single quotes around your command, otherwise the cat|cut command and the $i will expand in your local shell before getting to the remote machine.

Ekamjotsingh · 02-26-2014, 01:48 PM

you mean to say like this

ssh username@ipaddress 'for i in $( cat /etc/passwd| cut -d: -f1);do groups $i done;exit' >>abc.txt

suicidaleggroll · 02-26-2014, 01:50 PM

Yes

You don't need the ";exit" either, it will exit by itself when the command is done.

Ekamjotsingh · 02-26-2014, 01:53 PM

I tried the below command

ssh username@ipaddress 'for i in $( cat /etc/passwd| cut -d: -f1);do groups $i done' >>abc.txt

It gave me the below error

bash: -c: line 1: syntax error: unexpected end of file

suicidaleggroll · 02-26-2014, 02:03 PM

You missed a semicolon between the "$i" and "done" (I didn't catch that in the original post).

Code:

ssh user@ip 'for i in $(cat /etc/passwd|cut -d: -f1); do groups $i; done' >> abc.txt

Ekamjotsingh · 02-26-2014, 02:23 PM

Thanks a lot it worked.

But now i jst want to fetch the last few lines of /etc/sudoers file in this at the end for the same remote server.

How can i get that in the same server. i am trying to use from the below command

ssh user@ip 'for i in $(cat /etc/passwd|cut -d: -f1); do groups $i; done;cat /etc/sudoers' >> abc.txt

ALso one more problem is that /etc/sudoers can only be viewed by root for which i only have the sudo access. Any way i can achieve that.

suicidaleggroll · 02-26-2014, 02:28 PM

Not that I know of, sudo requires a tty in order to run (since it needs to prompt you for a password).

Ekamjotsingh · 02-26-2014, 02:30 PM

Thanks a lot of your help.

In the meanwhile i will try see if we can do sudo through any automated way.

suicidaleggroll · 02-26-2014, 02:33 PM

You may be able to get away with some fancy redirection and an expect script, but that will require putting your sudo password in plain-text in the script, which is not a good idea for security reasons.

Ekamjotsingh · 02-26-2014, 02:37 PM

sorry if i am asking too much questions.

Can you please assist me in that i want to try that.It is very interesting to use these features .