CODEWITHSUNDEEP
linuxbashssh
Alex
Alex

Reputation: 987

Checking if software is installed in SSH session

I am trying to check whether a certain package is installed on remote machine in bash script.

If I execute the following statement on the machine itself the result is 1 (installed) in file check.txt, which is correct:

dpkg-query -W -f='${Status}' nano 2>/dev/null | grep -c "ok installed" > /home/someuser/check.txt

However, if I execute the same command in SSH session, the result is always 0.

Can somebody explain why and how to correct this?

Thank you.

#!/bin/bash
ADDRESS=SOMEUSER@$SOMESERVER

function run {
    ssh $ADDRESS /bin/bash $@
}

run << SSHCONNECTION

dpkg-query -W -f='${Status}' nano 2>/dev/null | grep -c "ok installed" > /home/someuser/check.txt

SSHCONNECTION

Upvotes: 0

Views: 368

Answers (1)

kaylum
kaylum

Reputation: 14046

You need to escape the $ character:

dpkg-query -W -f='\${Status}' nano 2>/dev/null | grep -c "ok installed" > /home/someuser/check.txt

Upvotes: 1

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