Linux operating system and common commands 2. Common commands in linux

Linux operating system and common commands 2. Common commands in linux

Date: Time Management

Linux:

Hardware clock: clock, hwclock

Hwclock

-W: Change the hardware clock

-S: Change the system clock

System clock: date

Rtc: real time clock

Ntp: net time protocol

 

Get Command help:

Internal command:

Help COMMAND:

External commands:

COMMAND -- help

 

Command manual: manual

Man COMMAND

 

Whatis COMMAND: view the COMMAND section

Sub-sections:

1: USER command/bin,/usr/bin, usr/local/bin

2: System Call

3: Library call

4: Special files (device files)

5. File Format: explains the syntax of the configuration file.

6: Games

7: miscellaneous

8: management commands/sbin,/usr/sbin,/usr/local/sbin

 

[]: Can be omitted

<>: Required.

...: You can use multiple

|: Select one more

{}: Group

 

MAN:

NAME:

SYNOPSIS: Summary, outline

DESCRIPTION:

OPTIONS:

FILES:

BUGS:

EXAMPLES: Example

See also: SEE other

 

Screen flip:

Flip back: SPACE

One screen forward: B

Flip One Line Backward: ENTER

One row forward: k

 

Search:

/KEYWORD: backward

N: Next

N: Previous

? KEYWORD: Forward

N: Next

N: Previous

Q: Exit

 

Online Documentation:

Info COMMAND

 

Cal: calendar, view calendar

 

Echo: displays a line of text

Echo-e: Enable escape characters

\ N: line feed

 

Printf: Format and print data

\ N: line feed