Compression and decompression tools commonly used in Linux systems

Compression and decompression tools commonly used in Linux systems

Compression: An operation that takes time to change space;

Principles of compression: marking and substitution;

Compression ratio: The ratio of the size of the compressed file before compression, where: the compression of plain text files is relatively large, video, image and other file compression ratio is small

A tool that can implement compression capabilities:

Compress/uncompress:. Z Extension

gzip/gunzip:.gz extension

BZIP2/BUNZIP2:.BZ2 extension

XZ/UNXZ:.XZ extension, currently the highest compression tool

Zip/unzip:.zip extension

Gzip:

gzip, Gunzip, zcat-compress or expand files

Common options:

-D: Unzip

-#: Compression with the specified compression ratio, 1-9 is the highest; default 6

-C: Output compression results to standard output without compressing the original text

BZIP2:

bzip2, bunzip2-a block-sorting file compressor, v1.0.4

bzcat-decompresses files to stdout

-D: Unzip

-#: Specify compression ratio for compression, 1-9, default is 6

-K: Keep the original file not deleted, create a new compressed file;

Xz

XZ, UNXZ, xzcat-compress or decompress. xz files

-D: Unzip

-#: Specify compression ratio for compression, 1-9, default is 6

-K: Keep the original file not deleted, create a new compressed file;

Tar: Archive Program

Tar----Tape Archive: Tape Archive

Tar [OPTION ...] [FILE] ...

Main options:

-C: Create an archive file

-x: Release the contents of the archive file

-T: View files included in the profile

-u/-r: Add a new file to the archive file

Accessibility Options:

-F: Path to the file that specifies the archive

-C: Specifies the path to release when releasing the contents of the archive file;

-Z: Call gzip to compress when creating an archive file

-j: Call bzip2 to compress when creating an archive file

-j: When creating the profile, call XZ for compression (may not be supported)

--exclude: Exclude a file when releasing the archive file;

Compression and decompression tools commonly used in Linux systems