Linux command Learning (a)--ls command

The first thing you need to know is the command prompt

[[Email protected] ~] #

Current logged on user (root)

Host name (localhost)

Current directory (home directory)

Super User prompt (#)

Normal user prompt ($)

1.1 Format of the command

command [options] [parameters]

Note: Individual commands are not in this format

Multiple options can be written together

Shorthand option-a rather with--all

1.2 A few simple common commands

command 1:LS [options] [files or directories]

Command function: Querying contents of a directory

Options:

-a displays all files, including hidden files (is a shorthand for option--all)

-L Show more information

-D View Directory properties

-H humanized Display file size

-I display Inode (index node)

Ls-a Show All files,. Files that begin with are hidden files

Ls-l Permission Reference count owner belongs to group file size last modified time

Permissions: 10-bit

First bit: File type (-file; d directory; l soft link) also available (block device files, character device files, socket files, and pipe files)

rw-r--R-x (R-Read, W-write, X-execute)

U owner G-owned group O other person

Ls-d

Linux command Learning (a)--ls command