Note:Take a look at our in-depth guide on how to use theLinux set commandto learn more about it. Set an Environment Variable in Linux set a shell variable The simplest way to set a variable using the command lin
如果在赋值表达式中加上了空格,bash shell就会把值当成一个单独的命令: [root@instance-3lm099to ~]# my_wife =hanmeimei-bash: my_wife: command not found 设置了局部环境变量后,就能在shell进程的任何地方使用它了。但是,如果生成了另外一个shell,它在子shell中就不可用。 [root@instance-3lm099to ~]# ...
Set an Environment Variable in Linux set a shell variable The simplest way to set a variable using the command line is to type its name followed by a value: [VARIABLE_NAME]=[variable_value] 1. As an example, create a variable calledEXAMPLEwith a text value. If you type ...
When used without any arguments, the `env` command displays a list of all the environment variables set in the current shell session. Each variable is displayed on a separate line, showing the variable name followed by the value. To modify an environment variable, you can use the `env` com...
编辑/etc/environment文件或/etc/profile文件,添加以下内容: 代码语言:txt 复制 export VARIABLE_NAME=value 保存文件后,运行以下命令使更改生效: 代码语言:txt 复制 source /etc/environment 或者 代码语言:txt 复制 source /etc/profile 类型与应用场景 系统环境变量 这些变量通常由系统管理员设置,用于整个系统的配置...
reset-PerformRESEToftheCPUrun-run commandsinan environment variable saveenv-save environment variables to persistent storage setenv-setenvironment variables showvar-print local hushshell variables sleep-delay executionforsome time source-run script from memory ...
set OR env OR printenv 给环境变量赋值 You can modify each environmental or system variable using theexport command. Set the PATH environment variable to include the directory where you installed the bin directory with perl and shell scripts: ...
You can set your own variables at the command line per session, or make them permanent by placing them into the~/.bashrcfile,~/.profile, 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 ...
bash shell用一个叫做environment variable环境变量的特性来存储有关shell会话和工作环境的信息。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。 在bash shell中,环境变量分为两类: 全局变量; 局部变量; 1.1全局环境变量
set– The command assigns or defines an environment variable. 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 syst...