Script that tries to connect via SSH till connection is up

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# 1  
Old 08-09-2013
Script that tries to connect via SSH till connection is up


I need a script that tries to connect via SSH to a remote server
and that remote server might not be up yet, so retry until succeed
the error message I get if the server is not up yet is:
ssh: connect to host port 40001: Connection refused

any idea of a good way to do it ?


Last edited by OdedOvdat; 08-12-2013 at 05:33 PM..
# 2  
Old 08-09-2013
while :
   ssh myServer && break

# 3  
Old 08-09-2013
Suggestion: Use -q option to suppress ssh output.
# 4  
Old 08-12-2013
For safety, add a sleep to such I/O loop
while sleep 1
   ssh -q myServer && break

until ssh -q myServer
  sleep 1

# 5  
Old 08-12-2013
Originally Posted by MadeInGermany
For safety, add a sleep to such I/O loop
True. As the server could be not responding for another reason (like keys not being exchanged) I'd also add a safety measure against ssh asking interactively for passwords. Using your suggestion:

until ssh -o BatchMode yes -q myServer ; do
       sleep 1

I hope this helps.

# 6  
Old 08-13-2013
Works great
thanks guys
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