Linux commands: BZIP2/BUNZIP2 command-compression and decompression

Gzip/gunzip command

Function description

Similar to the Gizp/gunzip command, compress and decompress files. For directories that can only compress all files in the directory, after compression is complete, a compressed package with ". bz2" suffix is generated in the directory. BUNZIP2 is a soft link for bzip2, so both compression and angular compression can be done through bzip2. Use the following:

bzip2 [options] to compress the extracted files

Common parameters

Options	Description
-D	Decompression of compressed Files (equivalent to the decompression function of Bunzip)
-K	Keep the original file
-V	Show details when compressing or decompressing a file
-F	bzip2 when compressing and decompressing, if the output file has the same name as an existing file, the preset does not overwrite the existing file. To overwrite, use this option
-V	For each compressed and uncompressed document, the corresponding file name and compression ratio are displayed
-T	Test the integrity of a compressed file
- #	Compression level, 1-9, the larger the number, the higher the compression rate

Example

Command Installation & compression Demo

[Email protected] app]# bzip2 shell.txt #提示命令没有找到 -BASH:BZIP2: Command not found [Email protected] app]# yum-y install bzip2 #安装bzip2命令 [Email protected] app]# ll-h #shell. txt file 141k Total dosage 168K -rw-r--r--. 1 root root 181 November 17:34 99.sh -RW-------. 1 root root 12K November 14:08 messages -rw-r--r--. 1 root root 1.2K November 15:17 messages2.gz -rw-r--r--. 1 root root 1.2K November 14:36 messages.gz -rw-r--r--. 1 root root 141K November 10:17 Shell.txt [Email protected] app]# bzip2 shell.txt #提示命令没有找到 [Email protected] app]# ll-h #shell. txt compression changed from 141k to 48k, the original file shell.txt. Total dosage 72K -rw-r--r--. 1 root root 181 November 17:34 99.sh -RW-------. 1 root root 12K November 14:08 messages -rw-r--r--. 1 root root 1.2K November 15:17 messages2.gz -rw-r--r--. 1 root root 1.2K November 14:36 messages.gz -rw-r--r--. 1 root root 48K November 10:17 shell.txt.bz2

Use the-K parameter to retain the original file decompression

[[email protected] app]# bzip2-d-K shell.txt.bz2   #使用-D parameter compression, the-K parameter retains the original file [[email protected] app]# ll-h

use Bzcat to find out what 's on your file

[Email protected] app]# bzcat shell.txt.bz2 | more

The following commands and bzip2 are used essentially the same way, and the compressed file has an. xz extension.

Xz/unxz/xzcat Command Introduction bzip2 [OPTION] ... FILE ... -k:keep, keep the original documents; -D: Unzip -#:1-9, compression ratio, default is 6; Xzcat: View the contents of the text file without displaying the expanded condition;

Learn from:

Karst "Progressive Linux"

Marco Linux

This article is from the "Zhao Dongwei blog" blog, make sure to keep this source http://zhaodongwei.blog.51cto.com/4233742/1875805

Linux commands: BZIP2/BUNZIP2 command-compression and decompression