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What are the core commands of linux system

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Release: 2023-05-21 21:37:04
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System core command

cd

> Linux中切换目录的命令。

格式:

  cd  路径(需要切换的目录路径)



路径:

-  绝对路径:从根路径开始
-  相对路径:从当前目录开始

-  特殊路径:
   - .  : 当前目录
   - .. :
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ls

View the files under the corresponding path.

ls   路径(默认是当前路径)

要求:在当前目录查看/root目录下有哪些文件?

```

参数:

-a : 显示隐藏文件(隐藏文件:在Linux系统中,以.开头的文件及文件夹就可以称之为隐藏文件或隐藏文件夹)

```bash
[root@localhost yum.repos.d]# ls -a ../../root
.  ..  anaconda-ks.cfg  .bash_history  .bash_logout  .bash_profile  .bashrc  .cshrc  .tcshrc
``

-l : 列出指定路径下的文件详细信息

```
[root@localhost yum.repos.d]# ls -l ../../root
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pwd

> 显示当前所在路径。

[root@localhost yum.repos.d]# pwd
/etc/yum.repos.d
[root@localhost yum.repos.d]# cd /root/
[root@localhost ~]# pwd
/root
[root@localhost ~]#
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cat

> 查看文件内容的命令

格式:

cat   [路径]文件名称
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mv

Move a file

格式:
mv [原来的文件路径]  [新的文件的路径]



可以使用*匹配多个文件。

```bash
[root@localhost yum.repos.d]# mv CentOS-* backup/
mv: overwrite ‘backup/CentOS-Base.repo’? y
[root@localhost yum.repos.d]# ls -l
total 0
drwxr-xr-x. 2 root root 187 Mar  3 16:14 backup
[root@localhost yum.repos.d]#
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View System version

[root@localhost yum.repos.d]# cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core)
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