One of several Linux command series per day

A few simple commands related to the catalog:

1.ls

LS is the abbreviation of list, so it is list output of listing directory and file

Common parameters:

-l List Details

-H converts the unit from the default byte to K, M, G

-a lists all files and directories that are hidden

Where. Represents the current directory: Represents the parent directory

-R (reverse) reverse display

-R (recursion) recursive display

-I display inode number

2.pwd (print working direction)

Print current directory

3.CD (Chang directory)

CD ~ Open Home Directory

CD ~username Open the home directory for the specified user

4.mkdir (Make directory)

-P Recursive creation

-V Show More information

5.rmdir (remove directory)

-P Recursive Delete (can only be deleted if the directory is empty)

Two. Several commands concerning the order

1.type + command

View the type of the current command (commands are divided into built-in commands and external commands)

2.help + built-in commands

See Help for built-in commands

3.man + command

See Help for commands

4.whatis + command

View the chapters of the Command in man

Three. Print commands

1.echo

-E escapes certain characters (\n,\t,\b,\r)

-N No Line break

2.print

Direct output, default No line break, can be directly escaped

Four. Several time-related commands (the difference between date,clock,hwclock and contact)

1.date

viewing system time Information

Date +%d Show Month Day year

Date 05192310 changed on May 19 23:10

2.clock

Viewing hardware time

3.hwclock

Viewing the hardware clock (time in CMOS)

-W: Write system time to hardware time

-S: Write hardware time to system time

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One of several Linux command series per day