CODEWITHSUNDEEP
bash
Rdit
Rdit

Reputation: 1562

Wait for a proccess to finish

Could you please help me with any hint about the below issue?

i have to send a command to a host (the command needs lot of time to execute and creates a file):

ssh uname1@host1 ssh uname2@host2 'command1'

after this command gets executed i need to zip the file created

ssh uname1@host1 ssh uname2@host2 'gzip file1'

Than do the same thing for another host

ssh uname3@host3 ssh uname4@host4 'command1'
ssh uname1@host1 ssh uname2@host2 'gzip file2'

Is it possible to run both this commands in parallel in order to save time for script execution? thank you in advance.

Upvotes: 1

Views: 111

Answers (2)

Vorsprung
Vorsprung

Reputation: 34297

try something like 

ssh uname2@host2 'command1 && gzip file1' &
ssh uname2@host3 'command1 && gzip file1' &
ssh uname2@host4 'command1 && gzip file1' &

You can put all the commands in a file on the host you start from

&& in this context works like ; but the second command is only executed if the first works

Upvotes: 4

Gilles Quénot
Gilles Quénot

Reputation: 184975

Simply do:

ssh uname1@host1 ssh uname2@host2 'command1; gzip file1'

and if the gzip should be run only is the first command is a success, then :

ssh uname1@host1 ssh uname2@host2 'command1 && gzip file1'

The second command will be launched after the first one.

Upvotes: 2

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