bash shell用一个叫作环境变量(environment variable)的特性来存储有关shell会话和工作环境的信息(这也是它们被称作环境变量的原因)。这项特性允许你在内存中存储数据,以便程序或shell中运行的脚本能够轻松访问到它们。这也是存储持久数据的一种简便方法。 在bash shell中,环境变量分为两类: 全局变量 局部变量 全局环境...
The environment variable created in this waydisappears after you exit the current shell session. Set an Environment Variable in Linux Permanently If you wish a variable to persist after you close the shell session, you need to set it as an environmental variable permanently. You can choose betwee...
我介绍过 Linux 用 systemd 来取代 init 作为系统的初始化进程。
The environment variable created in this waydisappears after you exit the current shell session. Set an Environment Variable in Linux Permanently If you wish a variable to persist after you close the shell session, you need to set it as an environmental variable permanently. You c...
Linux环境(Environment)设置相关命令 参考链接: http://www.cyberciti.biz/faq/set-environment-variable-linux/ http://bash.cyberciti.biz/guide/Variables#Commonly_Used_Shell_Variables 列出所有系统环境变量 To see all system variables, type the following command at a console / terminal:...
Common commands used for environment variables in Linux For example, let’s learn how to modify theHOMEenvironment variable. Use the following command in the terminal: HOME="/home/username" After you’ve set the value of environment variableHOMEnow you need to export it for other programs to ...
set CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export CLASSPATH 1. 2. 3. 4. 5. 6. (3)重新登录 3. 直接在shell下设置变量 不赞成使用这种方法,因为换个shell,你的设置就无效了,因此这种方法仅仅是临时使用,以后要使用的时候又要重新设置,比较麻烦。
unset– The command deletes the environment variable. export– The command exports the value of the newly assigned environment variable. How to Define Environment Variables After seeing the list of present environment variables on your system, you can modify or redefine them. Use the variable’s ...
You can set your own variables at the command line per session, or make them permanent by placing them into thefile,, or whichever startup file you use for your default shell. On the command line, enter your environment variable and its value as you did earlier when changing thePATHvariable...
Now to set environment variable for "Intel Composer XE 2011", I tried the suggested command;[x_akhal@neolith1 ~]$ source intel_parallel_studio_xe/bin/compilervars.shERROR: Unknown switch 'PROD_DIR=/home/x_akhal/intel_parallel_studio_xe/composerxe-2...