script to check script is running and start it, if it’s stopped

I have a script with this name : Run.sh

I run this script with this command :

./run.sh

I don’t like stop this script but this script Suddenly stops and need run again.

I need a script to check it , if my run.sh stopped , run it again.

this is run.sh codes:

#!/usr/bin/env bash


install() {
        sudo apt-get update
        sudo apt-get upgrade
}

if [ "$1" = "install" ]; then
  install
  else

if [ ! -f ./tg/tgcli ]; then
    echo "tg not found"
    echo "Run $0 install"
    exit 1
 fi

   #sudo service redis-server restart
   #./tg/tgcli -s ./bot/bot.lua -l 1 -E $@
   ./tg/tgcli -s ./bot/bot.lua $@
fi

And i want run this script at boot (with screen or tmux) if my server restart

i have Ubuntu 16.04 version

Thank you Ljm Dullaart

Can you help me about this ?

Answer

You should not need to run the complete bash script again. Changing

./tg/tgcli -s ./bot/bot.lua $@

to

while :; do
   ./tg/tgcli -s ./bot/bot.lua $@
done

will restart bot.lua everytime it exits.