shell 登录环境设置顺序

清疚 2022-12-19 08:51 111阅读 0赞

### 文章目录 ###

*  1，查看bash说明文档： man bash
 *  2，登录并验证
 *   *  第一步, 修改各环境变量文件: 添加输出语句
     *  第二步, 交互式登录centos6/7
     *  第三步, 非交互式登录centos6/7

# 1，查看bash说明文档： man bash #

*  When bash is invoked as an interactive login shell, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash\_profile, reads and executes commands .
 *  When an interactive shell that is not a login shell is started, bash reads and executes commands from ~/.bashrc, if that file exists.

# 2，登录并验证 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70_pic_center]

## 第一步, 修改各环境变量文件: 添加输出语句 ##

做如下文件的修改后

[wang@c6 ~]# for i in /etc/profile ~/.bash_profile ~/.bashrc /etc/bashrc ; do head -2 $i ;done
    # /etc/profile
    echo " /etc/profile======="
    # .bash_profile
    echo "~/.bash_profile============"
    # .bashrc
    echo "~/.bashrc========="
    # /etc/bashrc
    echo " /etc/bashrc=========="

## 第二步, 交互式登录centos6/7 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70_pic_center 1]

[wang@c6 ~]# su -l wang
     /etc/profile=======
    ~/.bash_profile============
    ~/.bashrc=========
     /etc/bashrc==========

## 第三步, 非交互式登录centos6/7 ##

[wang@c6 ~]# su wang
    ~/.bashrc=========
     /etc/bashrc==========

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/97bcb4848ccd4e889199738c92b7f0f5.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70_pic_center 1]: https://img-blog.csdnimg.cn/20201106121323903.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU=,size_16,color_FFFFFF,t_70#pic_center