How do I write a retry logic in script to keep retrying to run it upto 5 times?

for i in 1 2 3 4 5; do command && break || sleep 15; done

Replace "command" with your command. This is assuming that "status code=FAIL" means any non-zero return code.

---

Variations:

Using the {..} syntax. Works in most shells, but not BusyBox sh:

for i in {1..5}; do command && break || sleep 15; done

Using seq and passing along the exit code of the failed command:

for i in $(seq 1 5); do command && s=0 && break || s=$? && sleep 15; done; (exit $s)

Same as above, but skipping sleep 15 after the final fail. Since it's better to only define the maximum number of loops once, this is achieved by sleeping at the start of the loop if i > 1:

for i in $(seq 1 5); do [ $i -gt 1 ] && sleep 15; command && s=0 && break || s=$?; done; (exit $s)

This script uses a counter n to limit the attempts at the command to five. If the command is successful, $? will hold zero and execution will break from the loop.

n=0
until [ "$n" -ge 5 ]
do
   command && break  # substitute your command here
   n=$((n+1)) 
   sleep 15
done

function fail {
  echo $1 >&2
  exit 1
}

function retry {
  local n=1
  local max=5
  local delay=15
  while true; do
    "$@" && break || {
      if [[ $n -lt $max ]]; then
        ((n++))
        echo "Command failed. Attempt $n/$max:"
        sleep $delay;
      else
        fail "The command has failed after $n attempts."
      fi
    }
  done
}

Example:

retry ping invalidserver

produces this output:

ping: unknown host invalidserver
Command failed. Attempt 2/5:
ping: unknown host invalidserver
Command failed. Attempt 3/5:
ping: unknown host invalidserver
Command failed. Attempt 4/5:
ping: unknown host invalidserver
Command failed. Attempt 5/5:
ping: unknown host invalidserver
The command 'ping invalidserver' failed after 5 attempts

For a real-world, working example with complex commands, see this script.