Analysis of compressed files under Linux _unix Linux

For those who have just come in contact with Linux, it will certainly give Linux a lot of different file names to get dizzy. Let's just say, in the case of compressed files, we know that there are only two types of compressed files that are most common in Windows, one is zip and the other is. Rap. But Linux is different, it has. GZ, tar.gz, tgz, bz2, and so on. Many compressed filenames, such as Z,. Tar, in addition to the. zip and. rar under Windows can also be used under Linux, but there are too few people using. zip and. rar in Linux. This article is to make a summary of these common compressed files, I hope you encounter these documents next time not be dizzy:

Before you make a concrete summary of the various types of compressed files, first understand two concepts: packaging and compression. Packaging refers to a large pile of files or directories into a total file, compression is a large file through some compression algorithm into a small file. Why should we distinguish between these two concepts? In fact, many of the compressed programs in Linux can only be compressed for a single file, so that when you want to compress a large number of files, you have to use the other tools to make this large pile of files into a package, and then the original compression program compression.

The most common packaging program under Linux is tar, and the packages we use in the TAR program are often referred to as the TAR packets, and the TAR package file commands are usually ended with. Tar. After the tar package is generated, you can compress it with other programs, so let's start with the basic usage of the TAR command:

There are many options for the tar command (which can be viewed with man tar), but there are a few options that are commonly used, and here are some examples:

# TAR-CF All.tar *.jpg
This command is to make all. jpg files into a package named All.tar. -C indicates the creation of a new package,-f Specifies the file name of the package.

# TAR-RF All.tar *.gif
This command adds all the. gif files to the All.tar package. -R means to add a file.

# Tar-uf All.tar logo.gif
This command updates the logo.gif file in the original tar package All.tar, and-U is the meaning of the update file.

# TAR-TF All.tar
This command lists all the files in the All.tar package----------T is the list of files

# TAR-XF All.tar
This command is to solve all the files in the All.tar package----------T is untied

The above is the most basic use of tar. In order to facilitate the packaging and unpacking of the user can compress or extract files, tar provides a special function. This is where tar can invoke other compression programs while packing or unpack, such as calling Gzip, bzip2, and so on.

1) Tar call gzip

Gzip is a compression program developed by the GNU organization, the file at the end of GZ is the result of gzip compression. The decompression program relative to Gzip is gunzip. Use the-Z parameter in tar to invoke gzip. Here are a few examples to illustrate:

# TAR-CZF all.tar.gz *.jpg
This command is to make all. jpg files into a tar package and use gzip compression to generate a gzip-compressed package named all.tar.gz

# TAR-XZF All.tar.gz
This command is to untie the packets generated above.

2) Tar call bzip2

BZIP2 is a more compressed program,. bz2 end of the file is the result of bzip2 compression. The bzip2 relative to the decompression program is BUNZIP2. Use-j this parameter in tar to invoke gzip. Here are a few examples to illustrate:

# TAR-CJF all.tar.bz2 *.jpg
The command is to make all. jpg files into a tar package, and use bzip2 compression to generate a BZIP2 compressed package named all.tar.bz2

# TAR-XJF ALL.TAR.BZ2
This command is to untie the packets generated above.

3) Tar call compress

Compress is also a compression program, but it seems that people who use compress are not as good as gzip and bzip2. The file at the end of Z is the result of bzip2 compression. The compress relative to the decompression program is uncompress. Use the-Z parameter in tar to invoke gzip. Here are a few examples to illustrate:

# TAR-CZF All.tar.z *.jpg
The command is to make all. jpg files into a tar package, and use compress compression to generate a uncompress compressed package named All.tar.z

# TAR-XZF All.tar.z
This command is to unlock the resulting package.

With the above knowledge, you should be able to unlock a variety of compressed files, the following for the TAR series of compressed files to make a summary:

1 for. Tar End of File

TAR-XF All.tar

2 for. GZ End of File

Gzip-d all.gz
Gunzip all.gz

3. Documents ending with. tgz or. tar.gz

Tar-xzf all.tar.gz
Tar-xzf all.tgz

4 for. bz2 End of File

Bzip2-d all.bz2
BUNZIP2 all.bz2

5) For tar.bz2 end of file

TAR-XJF all.tar.bz2

6) for. File at the end of Z

Uncompress all. Z

7 for. Tar.z End of File

Tar-xzf All.tar.z

In addition to the common compressed files under Windows. zip and. Rar,linux also have a corresponding way to extract them:

1) for. zip

Linux provides a zip and unzip program, ZIP is a compression program, unzip is the decompression program. They have a lot of parameter options, here is a simple introduction, still give examples of its use:

# Zip All.zip *.jpg
This command compresses all. jpg files into a zip package

# Unzip All.zip
This command is to extract all the files in the All.zip

2) for. rar

To process A. rar file under Linux, you need to install RAR for Linux, which can be downloaded from the Web, but remember that RAR for Linux
Not free; then install:

# TAR-XZPVF Rarlinux-3.2.0.tar.gz
# CD RAR
# make

This is installed, installed after the RAR and unrar these two programs, RAR is a compression program, Unrar is the decompression program. They have a lot of parameter options, here is a simple introduction, still give examples of its use:

# rar a All *.jpg
This command compresses all. jpg files into a RAR package named All.rar, which automatically attaches the. rar extension to the package name.

# Unrar E All.rar
This command is to extract all the files in the All.rar

In this context, we have introduced Linux under the TAR, gzip, gunzip, bzip2, bunzip2, compress, uncompress, zip, unzip, RAR, Unrar and other programs, you should have been able to use them for. Tar,. GZ,. tar.gz, tgz, bz2, tar.bz2,. Z,. Tar. Z,. zip,. rar, these 10 compressed files for decompression, you should not need to download a software and do not know how to untie under Linux and worry. And the above method is also basically effective for UNIX.

This article describes the programs in the Linux compression program tar, gzip, gunzip, bzip2, bunzip2, compress, uncompress, zip, unzip, RAR, Unrar, and how to use them for. Tar,. GZ,. tar.gz, tgz,. bz2,. tar.bz2,. Z,. Tar. Z,. zip,. rar, these 10 compressed files to operate.