Marco 9-4

Compress, unzip the command:

Compression format: gz,bz2,xz,zip,z

Compression algorithm: The algorithm is different, the compression ratio will be different;

Compress:filename.z

Gzip:.gz Gzip/path/to/somefile: The original file is deleted when the compression is complete

, d[

-#:1-9, specifying the compression ratio, which defaults to 6

Gunzip:gunzip/path/to/some_compress_file.gz: The original file will be deleted when the decompression is complete

Zcat/path/to/somefile.gz: To view the contents of a text file without being pressed

bzip2:bz2

A tool that has a greater compression ratio than gzip, using a format approximation

Bzip2/path/to/somefile

-D:

-#:1-9, default is 6

Bunzip2/path/to/somefile

Bzcat No pressure direct view

Xz:.xz

Xz/path/to/somefile

-D

-#:1-9, default is 6

-K: Keep the original file when compressing

Unxz

Xzdec

Xzcat

Archive: Archiving, archiving by itself does not imply compression

Zip: A tool that archives and compresses

Zip Filename.zip FILE1 FILE2 ...; Do not delete source files after compression

Unzip Filename.zip

Tar: Archive tool

-C: Create an archive file

-F File.tar: Archived files for operations

-X: Expand Archive

--xattrs: Preserves extended attribute information for files when archiving

-T: Do not expand the archive, view directly, what files are archived

-ZCF: Archive and invoke gzip compression

-ZXF: Call gzip to unzip and expand archive

-jcf:bzip2

-JXF:

-JCF:

-JXF:

Cpio: Archive Tool

Script Programming:

While loop: for scenes with unknown cycle times

Grammar:

While Condition;do

Statement

...

Done

Calculates the sum of all positive numbers within 100

#！ /bin/bash

Declare-i I=1

Declare-i sum=0

While [$I-le]:d o

Let sum+= $I

Let i++

Done

#! /bin/bash

#

Read-p "inputsomething": String=hello World

while [$STRING! = ' Quit '];do

echo $STRING |tv ' A-Z ' A-Z

Read-p "Input so

Marco 9-4