Analysis of compressed files in Linux

Article Title: Analysis of compressed files in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
For those who are new to Linux, they will surely get dizzy with a bunch of various file names in Linux. For example, we know that there are only two common types of compressed files in Windows: zip and. rap. There are too few developers. This article will summarize these common compressed files. I hope you will not be confused when you encounter these files next time.
　　
Before summarizing various types of compressed files, we should first clarify two concepts: Packaging and compression. Packaging refers to converting a large number of files or directories into a total file. Compression refers to converting a large file into a small file through some compression algorithms. Why do we need to differentiate these two concepts? In fact, this is because many Linux compression programs can only compress one file, so when you want to compress a large number of files, you have to use another tool to compress these files into a package and then compress the original compression program.
　　
At the end of lifecycle. After the tar package is generated, you can use other programs to compress it. So let's first talk about the basic usage of the tar command:
　　
There are many options for the tar command (which can be viewed using man tar), but there are several commonly used options. The following is an example:
　　
# Tar-cf all.tar *. jpg
This command is to pack all. jpg files into a package named all.tar. -C indicates that a new package is generated.-f specifies the package file name.
　　
# Tar-rf all.tar *. gif
This command adds all .gif files to the package of all.tar. -R indicates adding files.
# Tar-uf all.tar logo.gif
This command is used to update the logo.gif file in tarbao all.tar.-u indicates that the file is updated.
　　
# Tar-tf all.tar
This command is used to list all files in the all.tar package.-t is used to list objects.
　　
# Tar-xf all.tar
This command is used to extract all the files in the all.tar package.
　　
The above is the most basic usage of tar. To help you compress or decompress files while packing and unpackage, tar provides a special feature. This means that tar can call other compression programs, such as gzip and bzip2, while packaging or unpacking.
　　
1) tar calls gzip
　　
Gzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. The decompress program relative to gzip is gunzip. Use the-z parameter in tar to call gzip. The following is an example:
　　
# Tar-czf all.tar.gz *. jpg
Bytes
　　
# Tar-xzf all.tar.gz
This command unlocks the generated package.
　　
2) tar call bzip2
　　
Bzip2is a more powerful compression program. The file ending with .bz2 is the result of bzip2 compression. The decompress program relative to bzip2 is bunzip2. Use the-j parameter in tar to call gzip. The following is an example:
　　
# Tar-cjf all.tar.bz2 *. jpg
Bytes
　　
# Tar-xjf all.tar.bz2
This command unlocks the generated package.
3) tar call compress
　　
Compress is also a compression program, but it seems that there are not as many people using compress as gzip and bzip2 .. The file ending with Z is the result of bzip2 compression. The decompress program relative to compress is uncompress. Use the-Z parameter in tar to call gzip. The following is an example:
　　
# Tar-cZf all.tar. Z *. jpg
Forbidden. Z
　　
# Tar-xZf all.tar. Z
This command is used to unbind the generated package.
　　
With the above knowledge, you should be able to uncompress a variety of compressed files. The following is a summary of the compressed files in the tar series:
　　
1st pair of files ending with .tar
　　
Tar-xf all.tar
　　
2XX for the file ending with .gz
　　
Gzip-d all.gz
Gunzip all.gz
　　
32.16.tgzor .tar.gz
　　
Tar-xzf all.tar.gz
Tar-xzf all. tgz
　　
4)for the file ending with .bz2
　　
Bzip2-d all.bz2
Bunzip2 all.bz2
　　
5 bytes for the file ending with tar.bz2
　　
Tar-xjf all.tar.bz2
　　
6) for files ending with. Z
　　
Uncompress all. Z
　　
72.16.tar. Z
　　
Tar-xZf all.tar. z
　　
In addition, Linux has corresponding methods to decompress the compressed files .zipand .rar in Windows:
　　
1)for. Zip
　　
Linux provides zip and unzip programs, zip is a compression program, and unzip is a decompression program. They have many Parameter options. Here we will only give a brief introduction and give examples to illustrate their usage:
　　
# Zip all.zip *. jpg
This command compresses all .jpg files into a zip package.
　　
# Unzip all.zip
This command decompress all files in all.zip.
　　
2XX vs. .rar
　　
To process the. RAR file in linux, you need to install RAR for Linux, which can be downloaded from the Internet, but remember, RAR for Linux
Not free; download RAR for Linux 3.2.0 from http://www.rarsoft.com/download.htmand install:
　　
# Tar-xzpvf rarlinux-3.2.0.tar.gz
# Cd rar
# Make
　　
After installation, there will be two programs, rar and unrar. rar is a compression program, and unrar is a decompression program. They have many Parameter options. Here we will only give a brief introduction and give examples to illustrate their usage:
　　
# Rar a all *. jpg
This command is to compress all. jpg files into a rarpackage named all.rar. the program will automatically append the. rar extension name to the package name.
　　
# Unrar e all.rar
This command is to extract all files from all.rar.
　　
Decompress these 10 types of compressed files. You don't need to worry about downloading a software and not knowing how to unlock it in Linux. In addition, the above method is basically effective for Unix.
　　
To perform operations on the 10 types of compressed files.