Linux Basic 4 Common commands

Ls:list

-L: Long format

-A: Show All Files

-A: Shows all files including. and..

-D: Show directory

-H: for human Reading

-R: Reverse Display

-R: Recursive display

-I: Displays the inode of the file (the index node number of the file)

Ls-l Display Content Description:

1. First column: File type

-: Normal file

D: Catalog Files directory

B: Block device file

C: Character device character

L: Link File symbolic link

P: Piping Equipment pipe

S: Socket file socket

2, file permissions: Nine bits, each three bits for a group, respectively, is owner, group, other three group, and three bits are rwx respectively.

3, the number of hard links to the file.

4. Owner of the document

5. Group of documents

6. File Size (bytes)

7. Last modified time of file (Mtime). A timestamp of a total of three timestamps (timestamp):

Access time;

Modify time file modified;

Change time Meta data (metadate)

8. File name

Cd:change Directory

CD or CD ~: Go to the current user's home directory

CD ~ ' username ': Go to Username's home directory

CD-: Return to previous working directory

Type ' CMD ': Display file types: Built-in command (shell built-in) or external command (corresponding to an executable file)

Printenv: Displays the current environment variable

Clear: or ctrl+l clear screen

Hash: Show command cache table and hit count

Date

Clock

Hwclock:

Linux Basic 4 Common commands