Linux study notes _ 3_common Linux commands _ 5 _ compression and decompression commands

Compression and decompression commands: gz1, gzip [GNUzip]: bingzipgzip option [file] compressed file. after compression, the extension is gz, which is most commonly used in Linux, the & amp; 26684; feature of the most traditional and common software source code package: 1) only files can be compressed, not directories 2)

Compression and decompression commands:

. Gz

1. gzip [GNUzip]:/bin/gzip

Gzip option [file] // compressed file,The extension name after compression is .gz.Is the most common and traditional tool in Linux.

// Common software source code package formats

Features: 1) only files can be compressed and directories cannot be compressed.

2) do not retain the original file

E.g. gzipnewfile

2. gunzip [GNUzip]:/bin/gunzip

Or gzip-d

Decompress .gz

. Tar

3. tar:/bin/tar

Package the directory into a file,Generate .tar

If compression is performed at this time,Will generate .gz

Tar [option cvf] [Directory]

-C: The package file of pai.tar, required

-V: displays details.

-F: specifies the compressed file name, which is mandatory.

-Z: compress the package at the same time.

E.g. tar-cvfz dir1.tar.gz dir1 // package and compress dir into a file

Note: This one-step packaging and compression is not supported by all UNIX systems!

At this time: 1) package: tar-cf newdir.tar newdir

2) compression: gzipnewdir.tar

Or use a connector.

Attachment: file command: used to determine the file type

File [file name]

4. tar

Extract

-Xunpack the .tar file

-V: show details

-F: specifies the file to be decompressed.

-Z decompression

E.g. tar-zxf newdir4.tar.gz

Step by step gunzipnewdir.tar.gz

Tar-xvf newdir.tar

. Zip

5. zip:/usr/bin/zip

Windows and linuxare only generic. if the file size is not large, we recommend that you use. zip.

E.g. zipservices.zip/etc/services compressed files, and the source files are retained.

Services.zip is the compressed file name!

Zip-r newdir.zip test compressed Directory

Two major defects of gzip compensated by zip: 1) keep the source file

2) directory can be compressed

6. unzip/usr/bin/unzip

Extract

Above: unzipnewdir.zip

. Bz2

7. bzip2/usr/bin/bzip2

It is equivalent to an upgraded gzip version and is suitable for compressing large files.

Although only files can be compressed, the compression ratio is amazing,File name .bz2

Of course, it can also be used in combination with tar.

Bzip2 option [-k] [file name] // add-k to keep the source file, otherwise it will be the same as zip

8. bunzip2

Decompress the file, or use-k to retain the source compressed file.