Linux compression and packaging command usage (1)

Tar command

[Root @ linux ~] # Tar [-cxtzjvfpPN] file and directory ....

Parameters:

-C: create a parameter command for the compressed file );

-X: Unlock the parameter command of a compressed file!

-T: view the files in the tarfile!

Note that c/x/t can only exist under the parameter! Cannot exist at the same time!

Because it is impossible to simultaneously compress and decompress.

-Z: does it have the gzip attribute at the same time? That is, do I need to use gzip for compression?

-J: Does it have bzip2 attributes at the same time? That is, do I need to use bzip2 for compression?

-V: The file is displayed during compression! This is common, but it is not recommended to use it in the background execution process!

-F: use the file name. Please note that the file name should be followed immediately after f! Do not add parameters!

For example, using "tar-zcvfP tfile sfile" is an incorrect method.

"Tar-zcvPf tfile sfile" is correct!

-P: the original property of the original file will not be changed based on the user)

-P: absolute paths can be used for compression!

-N: a new date (yyyy/mm/dd) will be packed into the new file!

-- Exclude FILE: do not pack the FILE during compression!

Example:

Example 1: package all the files in the/etc directory into/tmp/etc.tar

[Root @ linux ~] # Tar-cvf/tmp/etc.tar/etc

Gzip and zcat commands

[Root @ linux ~] # Gzip [-cdt #] File Name

[Root @ linux ~] # Zcat file name .gz

Parameters:

-C: outputs compressed data to the screen and can be processed through data stream redirection;

-D: extract parameters;

-T: it can be used to check the consistency of a compressed file ~ Check whether the file has any errors;

-#: Compression level.-1 is the fastest, but the compression ratio is the worst.-9 is the slowest, but the compression ratio is the best! Default Value:-6 ~

Example:

Example 1: copy/etc/man. config to/tmp and compress it with gzip

[Root @ linux ~] # Cd/tmp

[Root @ linux tmp] # cp/etc/man. config.

[Root @ linux tmp] # gzip man. config

# At this time, man. config will become man.config.gz!

Example 2: Read the content of Example 1!

[Root @ linux tmp] # zcat man.config.gz

# The man.config.gz extracted file content is displayed on the screen !!

Example 3: Decompress the file in Example 1

[Root @ linux tmp] # gzip-d man.config.gz

Example 4: compress man. config unlocked in Example 3 with the optimal compression ratio and keep the original file

[Root @ linux tmp] # gzip-9-c man. config> man.config.gz

Bzip2, bzcat command

[Root @ linux ~] # Bzip2 [-cdz] File Name

[Root @ linux ~] # Bzcat file name .bz2

Parameters:

-C: output the data generated during the compression process to the screen!

-D: extracted Parameters

-Z: Compression Parameters

-#: Same as gzip, it is used to calculate the compression ratio.-9 is the best, and-1 is the fastest!

Example:

Example 1: compress/tmp/man. config with bzip2

[Root @ linux tmp] # bzip2-z man. config

# At this time, man. config will become man.config.bz2!

Example 2: Read the content of Example 1!

[Root @ linux tmp] # bzcat man.config.bz2

# The man.config.bz2 extracted file content is displayed on the screen !!

Example 3: Decompress the file in Example 1

[Root @ linux tmp] # bzip2-d man.config.bz2

Example 4: compress man. config unlocked in Example 3 with the optimal compression ratio and keep the original file

[Root @ linux tmp] # bzip2-9-c man. config> man.config.bz2

Compress command

[Root @ linux ~] # Compress [-dcr] file or directory

Parameters:

-D: extract parameters.

-R: It can be compressed together with files in the directory!

-C: output compressed data to standard output (output to the screen)

Example:

Example 1: copy/etc/man. config to/tmp and compress it

[Root @ linux ~] # Cd/tmp

[Root @ linux tmp] # cp/etc/man. config.

[Root @ linux tmp] # compress man. config

[Root @ linux tmp] # ls-l

-Rw-r -- 1 root 2605 Jul 27 :43 man. config. Z