How to ssh in a shell script

How to make ssh seamless for linux shell scripts

Sometimes we have trouble running ssh via shell script which loops through a huge list of hosts with key authorization and we face many issues like below :

• a host is highly loaded that holds the session
• host is not reachable
• prompting for password 
• you want to make ssh fail rather than prompt for password if the public key authorization fails 
• prompting for typing 'yes/no' 

Solution which takes care of the everything above :

ssh -oBatchMode=yes -o ConnectTimeout=10 -o StrictHostKeyChecking=no -o ConnectTimeout=5 -o PasswordAuthentication=no username@<hostname> "Do Stuff"