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 line is to type its name followed by a value: [VARIABLE_NAME]=[variable_va...
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 ...
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 ~]# ...
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...
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 ...
This section describes each type of environment variables, and shows how to see and use them. Note Even though the bash shell uses ... Get Linux® Command Line and Shell Scripting Bible now with the O’Reilly learning platform. O’Reilly members experience books, live events, courses curate...
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: ...
The import now sets the environment so that all of the variable names in this output are set to the values shown. For example, any rule that follows will now recognize ENV{ID_TYPE} as disk. 现在导入设置环境,以便此输出中的所有变量名称都设置为所示的值。 例如,任何随后的规则现在都将识别ENV...
2.11 Command-Line Editing(命令行编辑) As you play with the shell, notice that you can edit the command line using the left and right arrow keys, as well as page through previous commands using the up and down arrows. This is standard on most Linux systems. ...
You have to edit three files to set a permanent environment variable as follow: ~/.bashrc When you open any terminal window this file will be run. Therefore, if you wish to have a permanent environment variable in all of your terminal windows you have to add the following line at the en...