Linux Advanced Command (VI): compression and decompression command can be used to complete the command tar file compression and decompression

Compression and decompression command

learning target

• Able to use the tar command to complete file compression and decompression

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1. Introduction compression format

Linux compression format supported by default:

• .gz
• .bz2
• .zip

Description:

• .gz and .bz2 compression needs to use the tar command to compress and decompress
• .zip compression needs to use the zip command to compression, unzip command to decompress

Compression Purpose:

• Save disk space

Use 2. tar command and options

command	Explanation
takes	Compression and decompression command

tar command options:

Options	Explanation
-c	Create a package file
-v	Details display packing or unpacking
-f	Specify the file name, you must put all options back
-from	Compressing or decompressing (.gz)
-j	Compressing or decompressing (the .bz2)
-x	Unpack
-C	Unzip to a specified directory

FIG .gz is compressed into effect:

FIG .bz2 compressed into effect of:

FIG .gz decompression effect of:

Decompression to the specified directory .gz renderings:

FIG .bz2 decompression effect of:

Decompressing .bz2 to the specified directory renderings:

Use 3. zip and unzip commands and options

command	Explanation
zip	Into a .zip file format
unzip	Unzip the .zip file format

unzip command options:

Options	Explanation
-d	Unzip to a specified directory

FIG .zip is compressed into effect:

FIG .gz decompression effect of:

Decompress .zip to the specified directory renderings:

Description:

• .Gz compressed file format as much as possible to use, as there is less space
• Use the zip command more compressed files take up space, then more generic, more simple operation.

4. Summary

• .gz and .bz2 compressed files using the tar command to complete the compression and decompression
• .zip compressed files using zip and unzip command to complete compression and decompression