single-line process restarter without systemd

code.md

example program being monitored - sleep.sh

while [ 1 ]
do
  sleep 1
  echo hello
done

the invocation

while true; do sh sleep.sh; echo 'sleep.sh has crashed, restarting'; sleep 1; done

try it out

terminal 1

run the invocation

terminal 2

1. ps | grep sleep.sh, find the pid of the running sh sleep.sh
2. kill 123
3. observe the "monitor" announce the restart and the series of "hello" start up again