[SOLVED] expect feature to automate login to target host and "sudo su

apss_evaluator · 10-07-2015, 03:29 AM

Hi Guru's
just want to ask if this is possible, I'm trying to automate auto login to target host followed by "sudo su - user" to it but seems like I'm not sure if it is possible. Please advise, thanks

I am using cygwin

script I used = connect.sh

Code:

#!/usr/bin/expect

set timeout 5

set host [lindex $argv 0]

set user [lindex $argv 1]

set password [lindex $argv 2]

set password2 [lindex $argv 3]

spawn ssh -qt "$user\@$host"

expect "pogi_ako@target_host's password:"

send "password\r";

spawn sudo su - user

expect "[sudo] password for user:"

send "password\r";

interact

outcome of my test connect

Code:

$ ./connect.sh target_host pogi_ako password password
spawn ssh -qt pogi_ako@target_host
pogi_ako@target_host's password: spawn sudo su - user
couldn't execute "sudo": no such file or directory
    while executing
"spawn sudo su - user"
    (file "./connect.sh" line 19)

jefro · 10-07-2015, 05:32 PM

Try making the script with autoexpect. It seems to work better.

Ztcoracat · 10-07-2015, 06:38 PM

Do you have to run that script every time the system is turned on?

apss_evaluator · 10-07-2015, 07:21 PM

Quote:

Originally Posted by Ztcoracat

Do you have to run that script every time the system is turned on?

Hi Ztcoracat,
the script will be executed under alias to the name of the target host

chrism01 · 10-07-2015, 07:43 PM

I I saw this

Code:

couldn't execute "sudo": no such file or directory

the first thing I'd suspect is that its telling the truth ie the sudo cmd is not in the PATH after it initially logs in.
How about logging in manually and checking

Code:

which sudo

/usr/bin/sudo

then hardcode that path into the expect script ?

Ztcoracat · 10-07-2015, 08:02 PM

Quote:

Originally Posted by apss_evaluator

Hi Ztcoracat,
the script will be executed under alias to the name of the target host

Got it-

apss_evaluator · 10-08-2015, 02:53 AM

Saw a solution from online and got it working, though I'm really not yet fully aware on the add ons :-)

connect.sh

Code:

#!/usr/bin/expect -f

set host [lindex $argv 0]

set user [lindex $argv 1]

set password [lindex $argv 2]

set user2 [lindex $argv 3]

set password2 [lindex $argv 4]

spawn ssh -qt "$user\@$host"

expect "password:"

send "password\r";

send -- "sudo su - $user2\r"

expect -gl {[sudo] password for pogi_ako:}

send "password\r"

interact

Tried and execute:

Code:

pogi_ako@MY_CYGWIN ~
$ ./connect.sh target_host pogi_ako password user password
spawn ssh -qt pogi_ako@target_host
pogi_ako@target_host's password:
Last login: Thu Oct  8 01:19:07 2015 from 192.168.0.101
[pogi_ako@target_host ~]$ sudo su - user
[sudo] password for pogi_ako:
[user@target_host ~]$

From alias

Code:

alias target_host='echo "connecting on to target_host" ; ./connect.sh target_host pogi_ako password user password'

Test alias from my terminal

Code:

pogi_ako@MY_CYGWIN ~
$ target_host
connecting on to target_host
spawn ssh -qt pogi_ako@target_host
pogi_ako@target_host's password:
Last login: Thu Oct  8 02:42:35 2015 from 192.168.0.101
[pogi_ako@target_host ~]$ sudo su - user
[sudo] password for pogi_ako:
[user@target_host ~]$