Make a generic EFS commands script

[bdnf]

Command eksctl get cluster | sed -n '2p' | sed -e 's/\s.*$//' might return an output that will fail for subsequent commands.
Example:

eksctl get cluster | sed -n '2p' | sed -e 's/\s.*$//'` 
airflow-2	 u

usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:

  aws help
  aws <command> help
  aws <command> <subcommand> help

Unknown options: u

Also, watch command can be not present on other operation systems.

I will create a corresponding pull request with the fix.