Ls,cd,alias,path, directory structure, shortcut keys

2. LS List

   -l List Details

   -T in chronological order

   -d lists the current directory

   -A lists all files, including hidden files.

4. CD command

   . Current directory

   .. Parent Directory

   CD ~ Enter the current user home directory

   CD does not follow any parameters, directly into the current user home directory

6. PATH environment variable

   The echo $PATH lists the values of all environment variables for the current system, by default:

   /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:

   If you want to add temporarily, you can use path= $PATH: XXXX, example path= $PATH:/tmp

   /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/tmp

   To make the path permanent, you need to add it to the/etc/profile, restart it, or run the command directly:
   Source/etc/profile

8. Directory structure

   [[email protected] ~]# Tree/-l 1 View the main directory structure under the root of the current system:

   Where/bin,/sbin,/usr/bin,/usr/sbin The directory used to hold the command, where/sbin,/usr/sbin is used for root.

   /

   ├──bin 

   ├──boot launch profile

   ├──dev store Linux external devices

   ├──etc for configuration files

   ├──home User's home directory-Normal user's home directory:/home/username

   ├──lib link library

   ├──lib64

   ├──lost+found 

   ├──media 

   ├──mnt

   ├──opt  a directory for some large software or some special software

   ├──proc system kernel mappings

   ├──root Administrator Root home directory:/root

   ├──sbin

   ├──selinux

   ├──srv

   ├──sys

   ├──tmp for temporary files

   ├──usr used to hold user's installer files

   └──var Most of the logs are stored

10. Shortcut keys

    CTRL + a cursor back to the beginning

    Ctrl+e cursor jumps to the end of the line

    Ctrl+l Clear Screen

    Ctrl+u Delete all characters before the cursor
    Ctrl+k Delete all characters after cursor

    CTRL + C terminates the current operation

    ALT+F cursor moves forward to the next word

    ALT+B cursor moves backwards to the next word

    Ctrl+w Delete from the cursor position to the beginning of the current word

    Ctrl + R display: Prompt to find relevant historical commands according to user input (Reverse-i-search)
    

    These are more commonly used.

This article is from the "My Linux Road" blog, so be sure to keep this source http://8641765.blog.51cto.com/8631765/1695987

Ls,cd,alias,path, directory structure, shortcut keys