How to automatically ssh into server and su with password using bash script?

Question

I need to ssh into a server and su with password within that server and then ssh into another server from there. I am not able to su with password after I ssh into my first server via bash script. Normally what I do in terminal is,

$ ssh server1

logged in to server1$ su user

password: ******

switched to corresponding user$ ssh server2

How can I automate this process by switching user with password in bash?

This seems like an odd setup to begin with. Why can't you just login to user2@server1? If you can't, for whatever reason, then you can use the .bashrc to accomplish your task. — notStan
– notStan, Commented Jul 9, 2019 at 13:24
I need to login to user @server1 using a bash script but am not sure about doing that! Its raising issues like "su must be run from another terminal" — Coder94
– Coder94, Commented Jul 9, 2019 at 13:43

Matt Taylor · Accepted Answer · 2019-07-09 14:13:53Z

1

Have you tried this?

sshpass -f <(printf '%s\n' "yourpassword") ssh username@server "\"sshpass -f <(printf '%s\n' "yourpassword") ssh username@server"

edited Jul 9, 2019 at 14:13

answered Jul 9, 2019 at 13:19

Matt Taylor

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6 Comments

Matt Taylor Over a year ago

Maybe something along these lines.... I would test but I haven't got any servers that I can use atm.

Coder94 Over a year ago

Thanks but how can I pass the password?

Matt Taylor Over a year ago

What about using sshpass? sshpass -p 'YourPassword' ssh user@host

Coder94 Over a year ago

So, I tried sshpass -p 'YourPassword' ssh user@host and then "su user" its not it is asking password in the terminal

Coder94 Over a year ago

ssh username@server1 "su -c \"sshpass -p 'YourPassword' ssh user@server2"su -c"" is there any syntax issues? is is showing unexpected EOF

|

Eran Ben-Natan · Accepted Answer · 2019-07-10 05:03:02Z

1

Can sudo without password works for you?

ssh abc@$xyz "
    echo '
        set -vxe
        # Your script here
    ' | sudo /bin/bash"

answered Jul 10, 2019 at 5:03

Eran Ben-Natan

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