Bash script to run multiple AWS EC2 instance

Step 1: open vi <<filename>>.sh

Step2:  Enter the code as follows

a.  Add this code in the first line

#!/bin/bash

b.  Connect and run the comment with in the instance

ssh -i <<keyfile >> ec2-user@<<instance Ip>> << EOF

c.  Change user into root

sudo su -

d.  Write the comment you can to execute Eg

aws s3 sync <<S3 path>>  <<local path>>

e.  Exit from root

exit

f.  exit from instance

exit

EOF

Step3: Save and exit from editor

Setp4: provide a execute permission to created .sh file

      chmod +x <<filename.sh>>

Step 5: Run the file from terminal

   ./<<filename.sh>>