Linux 配置环境变量 $PATH

灰太狼 2023-02-20 03:24 111阅读 0赞

\#　Linux 配置环境变量 $PATH

## export 设置或显示环境变量 ##

*export 的效力仅限于该次登陆操作*

# 查看$PATH
    wujing@ubuntu-19-10:~$ echo $PATH
    /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
    
    # 添加环境变量
    wujing@ubuntu-19-10:~$ export PATH=$PATH:/home/wj 
    
    # 再次查看$PATH，已经添加成功
    wujing@ubuntu-19-10:~$ echo $PATH 
    /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/wj

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center]

## ~/.bashrc ##

*修改.bashrc文件之后，需重新加载.bashrc文件*

# 进入~/.bashrc文件
    wujing@ubuntu-19-10:~$ vim ~/.bashrc

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center 1]

# 另起一行添加
    export PATH=$PATH:/home/wj
    
    # 保存并退出
    :wq

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center 3]

# 重新加载.bashrc文件
    wujing@ubuntu-19-10:~$ source ./.bashrc
    
    # 再次查看$PATH，已经添加成功
    wujing@ubuntu-19-10:~$ echo $PATH 
    /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/wj

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center 4]

## /etc/profile ##

*修改profile之后，需注销重新登陆*

wujing@ubuntu-19-10:~$ sudo vim /etc/profile

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjg1Njg3MQ_size_16_color_FFFFFF_t_70_pic_center 5]

注销，重新登陆。

# 查看$PATH 
    wujing@ubuntu-19-10:~$ echo $PATH
    /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/wj

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