remote for loop with awk

Question

I have a little program that gets the pids of 3 processes that are listening on different ports:

Admins-Mac-mini-2:~ gitlabuser$ for pn in 23 33 43; do lsof -nP -iTCP:47${pn} | grep LISTEN | awk '{print $2}'; done
44171
44176
44181
Admins-Mac-mini-2:~

I want to run this little loop on a different machine so I tried backslashing the single quotes around the awk print like so:

Admins-Mac-mini-2:~ gitlabuser$ ssh gitlabuser@10.18.66.99 'for pn in 23 33 43; do lsof -nP -iTCP:47${pn} | grep LISTEN | awk \'{print $2}\'; done'
>

I also tried backslashing the $ :

Admins-Mac-mini-2:~ gitlabuser$ ssh gitlabuser@10.18.66.99 'for pn in 23 33 43; do lsof -nP -iTCP:47${pn} | grep LISTEN | awk \'{print \$2}\'; done'
>

It there a way to run that same command on both my local machine and the remote machine?

A

any way to get that for loop in such a way that itll work remotely or locally? — amadain, Aug 19 '20 at 14:01
put it as an answer will you? so that I can accept it and you can get the points — amadain, Aug 19 '20 at 14:17
It's likely already answered more comprehensively here: Quoting in ssh $host $FOO and ssh $host “sudo su user -c $FOO” type constructs — steeldriver, Aug 19 '20 at 14:21

score 0 · Answer 1 · answered Aug 19 '20 at 15:51

0

You can use below method

for i in remoteserverip
do
ssh -o 'StrictHostKeyChecking no' $i <<'EOF'
for pn in 23 33 43
do
lsof -nP -iTCP:47${pn} | grep LISTEN | awk '{print $2}'
done
EOF
done

answered Aug 19 '20 at 15:51

Praveen Kumar BS

5,211

remote for loop with awk

1 Answers1