Bash: controlling SSH

Question

I have this bash file, which asks for IP, password, etc. for OpenSSH to a device.

Now, if i use ssh root@ip, i have to enter the password. This is really irritating. Secondly; i cannot let my script send commands to it.

This is what i want->

1. Not the password thing; i already found something; but it tells me the commands are not found?:

   #!/usr/bin/expect -f

   spawn ssh root@$IPADDR

   expect "password:"

   sleep 1

   send "$rpass\r"

   2. I want the user to be able to see some menus where it can choose from; after that; every command is done for him. So like a new window, or something like that?

   3. I do not want to use: -Any external stuff -No extra editing of the SSH connection

BASH INFO: GNU Bash, v. 4.0.33(1)-release (i486-pc-linux-gnu), running on Linux Mint. But it got to be available for several linux distro's, and also on Mac?

Answer 1

The proper way to do this without storing passwords in plaintext on your machine is with ssh. First run:

ssh-keygen

This will generate a new SSH key in ~/.ssh/id_rsa.pub. After that simply run:

ssh-copy-id [email protected]

If you're on OS X or another machine that does not have "ssh-copy-id" there are one-line alternatives such as this one:

cat ~/.ssh/id_rsa.pub | ssh user@machine "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"

Ultimately you just need to append the contents of ~/.ssh/id_rsa.pub on your local machine to ~/.ssh/authorized_keys on the remote server. How you do that is up to you, the above are just quick shortcuts to do that.