Bash Shell Scripting- Executing multiple commands on multiple servers

This video tutorial covers the implementation of SSH authentication, both password and passwordless, and demonstrates how to execute multiple commands on remote servers. It introduces the use of loops to optimize command execution and explains how to set up passwordless authentication by generating and sharing SSH keys. The tutorial also highlights best practices for managing server IPs and passwords securely.

What is a recommended practice when using SSH for password authentication in scripts?

• Share the password with all users

• Hardcode the password in the script

• Use SSH Pass to pass the password

• Store the password in a file and reference it

Why is it beneficial to use loops in shell scripts when executing multiple commands?

• To execute commands in random order

• To make the script harder to read

• To avoid repetitive code and simplify the script

• To increase the script's execution time

What is the purpose of nesting loops when handling multiple servers in a script?

• To execute commands in parallel

• To reduce the number of servers

• To repeat the same logic for each server

• To execute different commands on each server

What is the first step in setting up passwordless SSH authentication?

• Delete the SSH directory

• Create a new user on the server

• Share the private key with the server

• Generate SSH keys on the local machine

How can you optimize a script to handle a large number of server IPs?

• Manually update the script for each server

• Use a single IP for all servers

• Store IPs in a file and read them dynamically

• Hardcode all IPs in the script