Wrapping sudo & ssh command inside bash

Question

I need to switch to sudo user and then run a command on remote server using SSH

Actual command

docker stats --no-stream --format  "\"{{ .Name }}\^C{\"memory\":{\"raw\":\"{{ .MemUsage }}\",\"percent\":\"{{ .MemPerc }}\"},\"Node\":\"{{ \"`hostname -i`\" }}\",\"cpu\":\"{{ .CPUPerc }}\"},"

running from ssh also works

ssh 1.2.3.4 'docker stats --no-stream --format  "\"{{ .Name }}\^C{\"memory\":{\"raw\":\"{{ .MemUsage }}\",\"percent\":\"{{ .MemPerc }}\"},\"Node\":\"{{ \"`hostname -i`\" }}\",\"cpu\":\"{{ .CPUPerc }}\"},"'

But when i try to pass it as sudo su - core -c its not working because " pattern matching. How to properly wrap this command ?

sudo su - core -c 'ssh 1.2.3.4 'docker stats --no-stream --format  "\"{{ .Name }}\^C{\"memory\":{\"raw\":\"{{ .MemUsage }}\",\"percent\":\"{{ .MemPerc }}\"},\"Node\":\"{{ \"`hostname -i`\" }}\",\"cpu\":\"{{ .CPUPerc }}\"},"''

i tried command='docker stats --no-stream --format "\"{{ .Name }}\^C{\"memory\":{\"raw\":\"{{ .MemUsage }}\",\"percent\":\"{{ .MemPerc }}\"},\"Node\":\"{{ \"hostname -i\" }}\",\"cpu\":\"{{ .CPUPerc }}\"}," ';sudo su - core -c 'ssh 1.2.3.4 $command' that didn't work either — Sandeep Lade
– Sandeep Lade, Commented Mar 10, 2021 at 9:16

Philippe · Accepted Answer · 2021-03-10 11:51:52Z

1

It's simpler with here-document :

sudo su - core << 'END_SUDO'
  ssh self << 'END_SSH'
docker stats --no-stream --format  '"{{ .Name }}{"memory":{"raw":"{{ .MemUsage }}","percent":"{{ .MemPerc }}"},"Node":"{{ "'"$(hostname -i)"'" }}","cpu":"{{ .CPUPerc }}"},'
END_SSH
END_SUDO

answered Mar 10, 2021 at 11:51

Philippe

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2 Comments

Sandeep Lade Over a year ago

Thanks this works. But one problem when I am using ssh -q it still prints banner. Any idea how to supress ssh banner here ?

Philippe Over a year ago

-q is supposed to suppress most warning and diagnostic messages, not the banner. If you have control on ssh server, you can set PrintMotd=no

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