Environment Variable and Set-UID Program Lab
王明霞 16307130350
1 Overview
Understand how environment variables affect program and system behaviors.
Environment variables are a set of dynamic named values that can affect the way
running processes will behave on a computer.
2 Lab Tasks
2.1 Task 1: Manipulating Environment Variables
1、 Use printenv or env command to print out the environment variables
printenv 和 env 均可输出当前系统的环境变量。不同的是 printenv 不加参数和 env 一
样，而 printenv 可以打印指定名称的环境变量。
”printenv PWD “或者“env | grep PWD”单独打印出来。
