Execute command if I logged in from a specific user

Question

I have a server that has a superuser (user1) with special rights to perform certain operations. And there are some other system users.

Is there any way to execute set of commands if and only if I logged in from system user (user2)?

Or any way to identify from which system user I have logged in to my superuser?

For example, I want to run a script which will, if I login from system user (user2), execute:

[user2@test ~]$ sudo su - user1
user2 Password:
[user1@test ~]$ sh script.sh

Put the commands in the user's `.profile`, they'll be executed when that user logs in. — Barmar, Oct 07 '17 at 08:08
Are you talking about doing something when certain users use `sudo` or `su`? — Barmar, Oct 07 '17 at 08:09
SO is for programming questions, not questions about using or configuring Linux. SuperUser.com or unix.stackexchange.com would be better places for questions like this. — Barmar, Oct 07 '17 at 08:09
@Barmar i don't what to execute for all the user. only for a specific user — Kaushal, Oct 07 '17 at 08:10
but i want to execute script once i logged in my super user, not in system user — Kaushal, Oct 07 '17 at 08:14
What do you mean by "once I logged in my super user"? Are you talking about using the `su` or `sudo` commands to execute a command as root? — Barmar, Oct 07 '17 at 08:15
yes similer like - `[user2@test ~]$ sudo su - user1 \n user2 Password: \n [user1@test ~]$ sh script.sh` — Kaushal, Oct 07 '17 at 08:17
@Barmar i have modified the question and is there any way to get this kind of automation? — Kaushal, Oct 07 '17 at 08:23

score 1 · Accepted Answer · answered Oct 07 '17 at 08:23

1

The who am i command will show the name of the user that originally logged in on that terminal. You can use that to detect if you've switched from one user account to another with su. So in ~user1/.profile you can put:

orig_user=$(who am i | awk '{print $1}')
if [[ $orig_user = user2 ]]
then
    sh script.sh
fi

answered Oct 07 '17 at 08:23

Barmar

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Is there any way, instead of username i can use UID? – Kaushal Oct 07 '17 at 08:27
I don't think so. The original uid isn't saved anywhere. – Barmar Oct 07 '17 at 08:28

Execute command if I logged in from a specific user

1 Answers1