linux export
时间: 2023-04-29 11:04:16 浏览: 53
`export`是Linux系统中的一条常用命令,用于设置环境变量。它将某个变量的值导出到当前 shell 的环境中,使其子进程可以继承该变量。使用方法如下:
```
export VARIABLE_NAME=value
```
例如:
```
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
```
这条命令将 JAVA_HOME 这个环境变量设置为 /usr/lib/jvm/java-8-openjdk-amd64。
使用export 命令定义的变量只在当前shell会话有效,需要保证他在重新开启终端或登陆后仍有效,应在登陆后执行或在配置文件中定义(如~/.bashrc)
相关问题
LINUX export
The `export` command in Linux is used to set environment variables. When you run a command or a script, it runs in its own environment, and environment variables can be used to store data that the command or script needs.
To use the `export` command, you typically write it followed by the name of the variable you want to set, an equal sign (=), and the value you want to assign to the variable. For example, to set the `PATH` variable to include a new directory, you can use the following command:
```
export PATH=$PATH:/new/directory
```
This command appends the `/new/directory` to the existing value of the `PATH` variable. The `PATH` variable is used by the shell to find executable files.
You can also use the `export` command to make variables available to child processes. When you export a variable, it becomes part of the environment of any child processes that are spawned from the current shell.
Note that the changes made with `export` are not permanent and will only affect the current session. If you want to make environment variable changes persistent across sessions, you'll need to modify the appropriate configuration files (e.g., `.bashrc` or `.bash_profile`).
Let me know if you have any further questions!
linux export
在 Linux 操作系统中,export 命令用于设置环境变量。环境变量是一些在操作系统中定义的动态值,可以被程序或 shell 脚本使用。通过 export 命令设置的环境变量可以在当前 shell 会话和子进程中使用。
export 命令的基本语法如下:
```
export VARNAME=value
```
其中,VARNAME 是环境变量的名称,value 是环境变量的值。如果要将多个值赋给同一个环境变量,可以使用冒号分隔符。例如:
```
export PATH=/usr/local/bin:/usr/bin:/bin
```
这个命令将 PATH 环境变量设置为 /usr/local/bin:/usr/bin:/bin,其中包含了多个目录。