#! /bin/sh
# timestamp (Bourne shell script) -- prints the date and time, separated by a space
# Usage: timestamp [ -u ]
# Where -u causes UTC to be used instead ("Z" is printed after the time)

if [ "x$1" = x-u ] ; then
  shift
  date "$@" -u '+%Y-%m-%d %H:%MZ'
else
  date "$@" '+%Y-%m-%d %H:%M'
fi