Introduction to Linux commands

Introduction to Linux commands

1. General Format of Linux commands: cmd [options] [arguments]

Cdm: command name

Options: options

Arguments: Parameters

Eg: ls

Ls-l

Ls-l test.txt

Note: There are many options following the command in the following two ways:

Ls-l-r test.txt

Ls-lr test.txt (this method is more detailed when there are many options)

2. Call the HELP command to view the parameter description of the corresponding command: cmd indicates the command to be viewed

(1) cmd -- help

(2) man cmd

(3) info cmd

Eg: ls -- help

3. "wildcard" in the command: Fuzzy search is required sometimes.

(1) "*" matches 0 or more characters

(2 )"? "Match any character

(3) "[]" matches any character in the brackets

Eg: ls test *. txt displays all files or directories starting with "test" and ending with ". txt ".

Ls test ?. Txt files or directories that start with "test" and end with ". txt"

Ls test1_232.16.txt: test2.txt and test3.txt are displayed. If the current directory exists

Ls-l test.txt

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