Add script 'time_duration.sh'.

snippets/time_duration.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+function time_duration () {
+
+   local __begin=$1
+   local __end=$2
+
+   local __duration
+
+   if [[ "$__begin" ]] && [[ "$__end" ]] ; then
+
+      local __duration
+
+      local __time=`expr $__end - $__begin`
+      local __t_h=`expr $__time / 60 / 60`
+      local __t_rest_h=`expr $__time - $__t_h \\* 60 \\* 60`
+      local __t_m=`expr $__t_rest_h / 60`
+      local __t_s=`expr $__t_rest_h - $__t_m \\* 60`
+
+      if [[ $__t_h -gt 0 ]]; then
+         echo "$__t_h h : $__t_m min : $__t_s sec"
+      elif [[ $__t_m -gt 0 ]]; then
+         echo "$__t_m min : $__t_s sec"
+      else
+         echo "$__t_s sec"
+      fi
+
+   else
+      echo "N/A"
+   fi
+
+
+}
+
+b_timestamp=$(date +"%s")
+sleep 3
+e_timestamp=$(date +"%s")
+
+duration=$(time_duration $b_timestamp $e_timestamp)
+
+echo ""
+echo "time duration: [ $duration ]"
+echo ""
+
+exit 0