CODEWITHSUNDEEP
bashshellscriptingautomation
Aty
Aty

Reputation: 309

Shell script to parallely execute a command remotely on N systems

How to execute a command remotely on N systems in parallel via shell script? The command is yum -y update

Upvotes: 0

Views: 86

Answers (3)

Ole Tange
Ole Tange

Reputation: 33685

GNU Parallel has a function for that:

N=10
parallel -j$N --nonall -S server1,server2,server3 yum -y update

The servers can also be read from a file:

N=10
parallel -j$N --nonall --slf hostfile yum -y update

Upvotes: 1

AFR
AFR

Reputation: 130

You can give a try to Cluster SSH. It´s a simple way to execute the same things in a number of machines. Follow the link to view a tutorial.

Upvotes: 0

jmlemetayer
jmlemetayer

Reputation: 4952

Basically I will do that:

for SRV in srv1 srv2 srv3
do
    ssh ${SRV} "yum -y update" &
done
wait

It will start the command on each servers and wait for everything to finish.

You should consider to add the different srv in your .ssh/config and use a public key authentication on each servers.

Upvotes: 1

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