Linux Learning 01_ Basic command Introduction

Beginner Linux, still groping in the process, in the hope to record the learning of the things, reference to the book of "Brother Bird's Linux private dishes"

Here are a few of the main commands learned here:

Data CALBC Mans shutdown Sync

1. Basic command operation

Data----commands for displaying dates and practices

Cal----commands for displaying calendars

BC----Simple and Useful calculator command

　　

1 Data 2     Displays the current Linux system time: data 3     Displays Date: Data +%y/%m/%D  4     display time: Data +%h:%  M  5  6cal  7     basic syntax: cal [[month] year]  8     Display System current month: Cal  9     Ten BC  One     Note: The QUIT command indicates exiting the BC calculator, while the Scale=number command, where number is the count of digits after the decimal point

2. Important Hotkeys

"tab"----commands and file completion

"Ctrl" +c----force to stop a running command

"Ctrl" +d----used instead of exit shortcut keys

3. Online Help: Man info

Man is a shorthand for manual (operating instructions)

4, the key shutdown method

Our customary shutdown method is shutdown, and the reboot, Halt, and Powerroff commands are commands for restarting and shutting down the machine. Here, remember the common ones.

　　

shutdown Syntax Rules:    shutdown [parameter] [TIME] [warning message]        -Hnow-R now

Also run the sync command before shutting down: Write data synchronously to disk

Linux Learning 01_ Basic command Introduction