script3

unix和linux编程实践教程-源代码

#!/bin/sh
# script3 - shows how an environment variable is passed to commands
# TZ is timezone, affect things like date, and ls -l
#
echo "The time in Boston is"
	TZ=EST5EDT
	export TZ            # add TZ to the environment
	date                 # date uses the value in TZ
echo "The time in Chicago is"
	TZ=CST6CDT
	date
echo "The time in LA is"
	TZ=PST8PDT
	date