Simple shell script for restart program.

restart.sh

#! /bin/bash

# Get server name source restart.sh sendclient.
servername=${1-'server'}

# Make logs dir if not exist.
mkdir -p logs

# If log file exist, rm and rename it.
if [ -f $servername.log ]; then 
  mv $servername.log logs/`date '+%Y-%m-%d-%H-%M-%S'`.log
fi

# Try to kill all pre program.
if [ -f $servername.pid ]; then 
  while read pid; do
    kill -0 $pid && kill $pid
  done < $servername.pid
  rm -rf $servername.pid
fi

# Start server & write log.
nohup node server.js >> $servername.log 2>&1&

# Write pid to .pid.
echo $! > $servername.pid