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feat: add image remote url and add linux auth content
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| Original file line number | Diff line number | Diff line change |
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| --- | ||
| layout: doc | ||
| --- | ||
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| # 权限相关 | ||
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| ## 权限的作用 | ||
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| - 对`文件来`说最高权限是`x(可执行)` | ||
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| - 对`目录`来讲最高权限是`w(可写)`，对目录有了`w`权限，就可以做任何事情 | ||
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| ## 权限详情 | ||
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| | 权限项 | 读 | 写 | 执行 | | ||
| |:----:|:-----:|:-----:|:-----:| | ||
| | 字符表示 | r | w | x | | ||
| | 数字表示 | 4 | 2 | 1 | | ||
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| ### 文件权限 | ||
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| | 权限 | 含义 | 示例 | | ||
| |:---:|:-----------------------------:|:--------------------------:| | ||
| |r| 读取文件内容 | `cat`、`more`、`head`、`tail` | | ||
| |w| 编辑、新增、修改文件内容，`不能删除文件`，除非对目录有`写权限` | `vim`、`echo` | | ||
| |x|可执行| ./xxx.sh | | ||
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| ### 文件夹(目录)权限 | ||
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| | 权限 | 含义 | 示例 | | ||
| |:---:|:----------------------------------------:|:----------------------:| | ||
| |r| 可以查看目录下的文件名 | `ls`、`ll`、`la` | | ||
| |w| 具有`修改目录结构`的权限。如`新建`、`删除`、`重命名`此目录下的文件和目录 | `touch`、`rm`、`mv`、`cp` | | ||
| |x| 可进入目录 | `cd` | | ||
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| ### 权限位 | ||
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| 执行`la`,查看权限，例如：`drwx------` | ||
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| ```shell | ||
| ➜ js-project la | ||
| total 72 | ||
| drwxr-xr-x@ | ||
| drwxr-xr-x@ | ||
| -rw-r--r--@ | ||
| ``` | ||
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| `权限位`总共十位 | ||
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| - 第`1`位表示`文件类型` | ||
| - `d`：文件夹 | ||
| - `l`：软链接文件 | ||
| - `-`：普通文件 | ||
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| - 第`2-4`位表示`文件拥有者权限` | ||
| - `r`：可读 | ||
| - `w`：可写 | ||
| - `x`：可执行 | ||
| - `-`：什么权限都没有 | ||
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| - 第`5-7`位表示`文件所属群组权限` | ||
| - `r`：可读 | ||
| - `w`：可写 | ||
| - `x`：可执行 | ||
| - `-`：什么权限都没有 | ||
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| - 第`8-10`位表示`其他人的权限` | ||
| - `r`：可读 | ||
| - `w`：可写 | ||
| - `x`：可执行 | ||
| - `-`：什么权限都没有 | ||
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| ## 修改权限 | ||
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| ### `chmod` | ||
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| > 改变`文件权限` | ||
| ```shell | ||
| chmod [选项] 模式 文件名 | ||
| chmod [ugoa] [+-=] [rwx] 文件/目录 | ||
| ``` | ||
| :::tip | ||
| - `u`：代表所有者 | ||
| - `g`：代表所属组 | ||
| - `o`：代表其他人 | ||
| - `a`：所有 | ||
| - `+`：增加权限 | ||
| - `-`：去除权限 | ||
| - `=`：赋予权限 | ||
| ::: | ||
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| > 例如： | ||
| ```shell | ||
| chmod a+/-x filename // 给所有人增加/移除x(可执行)权限 | ||
| ``` | ||
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| ### `chown` | ||
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| > 改变`文件拥有者` | ||
| ```shell | ||
| chown 用户名 文件名 | ||
| ``` | ||
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| ### `chgrp` | ||
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| > 改变`文件所属群组` | ||
| ```shell | ||
| chgrp 组名 文件名 | ||
| ``` |
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| --- | ||
| layout: doc | ||
| --- | ||
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| # 用户操作相关 | ||
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| ## 查看用户列表 | ||
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| ```shell | ||
| cat /etc/passwd | ||
| ``` | ||
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| ## 切换用户 | ||
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| ```shell | ||
| su username | ||
| ``` | ||
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| ## root用户才有的操作 | ||
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| :::warning | ||
| 以下操作只有`root`账号才可以可用 | ||
| ::: | ||
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| ### 添加新用户 | ||
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| ```shell | ||
| adduser username | ||
| ``` | ||
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| ### 给已创建的用户user设置密码 | ||
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| ```shell | ||
| passwd username | ||
| ``` | ||
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| ### 为用户添加权限 | ||
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| ```shell | ||
| gpasswd -h 查看操作 | ||
| ``` | ||
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| - `-a`：添加用户到组 | ||
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| - `-d`：从组删除用户 | ||
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