Bash script for interactive ssh and mysql commands

Question

I'm studying MySQL, and every time I have to

1. Enter ssh XXX@XXX command, and enter my password to the school server.
2. Enter mysql -u XXX -p command, and enter MySQL password.

I want to create a Bash script for performing the steps above automatically.

I can accomplish the first step with this code:

#!/usr/bin/expect -f    
set address xxx.com   
set password xxx  
set timeout 10   
spawn ssh xxx@$address   
expect {    "*yes/no" { send "yes\r"; exp_continue}    "*password:" { send "$password\r" }  }  
send clear\r 
interact

But I don't know how to automatically input the next command ( mysql -u xxx -p ) and the password.

How can I do this?

Answer 1

You don't need such a complex script to just enter the MySQL console on remote machine. Use the features of the ssh tool:

ssh -tt user@host -- mysql -uuser -ppassword

The -t option forces pseudo-terminal allocation. Multiple -t force tty allocation, even if ssh has no local tty (see man ssh ). Note the use of -p option. There must be no spaces between -p and password (see the manual for mysql ).

Or even connect via mysql directly, if the MySQL host is accessible from your local machine:

mysql -hhost -uuser -p

Don't forget to adjust the shebang :

#!/bin/bash -

Answer 2

Use my.cnf to store your password securly like ssh keys.

https://easyengine.io/tutorials/mysql/mycnf-preference/

Same way ssh is also possible through ssh -i parameter and passing the private key path of the remote host.

Best of luck!