Schedules server restart script

launch.sh

#!/bin/bash
#NOTE: USE `bash launch` not `sh launch`
timestamp(){
(date)
}
server_name="schedules-backend"
log_file="crash_log.txt"
server_log="server_log.txt"
time=$(timestamp)
crash_message="Restarting server. Logging scripted restart. (Add successful restart log);\n"
log_message="$time: $crash_message"
if lsof -i:1337 > /dev/null && [ "$1" != "-r" ]
  then
    echo "$time: Server is OK"
    if [ "$1" == "-k" ]
      then
        kill `lsof -t -i:1337`
        echo "$time: Killing server" >> ~/$server_log
        echo "$time: Killing server"
    fi
  else
    if [ "$1" == "-r" ]
      then 
        kill `lsof -t -i:1337` 
    fi
    echo "$time: Restarting server on 1337, logging restart to $log_file"
    echo $log_message >> $log_file && echo $log_message >> ~/$server_log
    cd ~/$server_name
    sails lift >> ~/$server_log &
fi

NOTE: USE bash launch not sh launch