File compression and Packaging---compress,gzip,zcat,bzip2,bzcat,tar,find,tarfile,tarball under Linux

Common Linux Compressed file extensions

*. Z Compress compressed files (has been replaced by gzip)

*.gz gzip Program Compressed files

*.BZ2 BZIP2 Program Compressed files (better than gzip, but only for one file to compress)

*.tar Tar program packaged data, no compression (using tar to package a file, you can solve the problem that bzip2 cannot compress multiple files)

*.tar.gz Tar program packaged data, and gzip compressed

*.TAR.BZ2 the TAR program to package the data and pass the BZIP2 compression

Compress using the Ubuntu installation command:

Apt-get Install Compress

Operation Command:

The target file is replaced after executing the command

Compress compress [-RCV] file name or directory name

Unzip the uncompress file name. z

Execute command does not replace target file

Compress compress-c target file name > new file name

Main parameters:

-R: Compressed files in connected directory

-C: Output compressed data to the screen (without actual compression)

-V: Output of compressed file information and file changes (not actually compressed)

Use of Gzip,zcat

Gzip can unlock compress,zip and gzip compressed files, zip file extension gz

Operation Command:

gzip [-cdtv#] file name or directory name

Zcat file name. GZ does not unzip the contents of the output compressed file on the screen

Execute command does not replace target file

Gzip-c target file name > new file name

gizp-d target file name > new file name

Main parameters:

-C: Output compressed data to the screen

-D: decompressed parameters

-T: Used to verify the consistency of a compressed file to see if there are errors

-V: Displays compression ratio information for the original file/compressed file

-#: Compression level, 1 fastest, 9 slowest, default-6, slow speed and compression ratio inversely proportional

Gunzip is also a decompression command

Bzip2,bzcat the use of the operation command:

bzip2 [-cdkzv#] File name

Bzcat file name. bz2

Main parameters:

-C: Output compression generated data to the screen

-D: decompression parameters

-K: retains the original file and does not delete the original file

-Z: Compressed parameters

-V: Displays compression ratio information for the original file/compressed file

-V: Same as Gzip

The BUNZIP2 command can also be used to decompress

Package Command: Tar operation command:

Package and compress: tar [-j|-z] [cv] [-f file name]

View files: tar [-j|-z] [tv] [-f filename]

Decompression: tar [-j|-z] [xv] [-f filename] [-C directory]

Main parameters:

-C: Create a packaged file that can be paired with-V to see the file name being packaged in the process

-T: See what files are included in the packaged file

-X: Decompression or unpacking function, can be solved with-C (uppercase) in a specific directory,-c,-t,-x can not appear in a series of commands

-J: Compression/Decompression with BZIP2 support: This file name is preferably *.tar.bz2

-Z: Compression/Decompression with GZIP support: This file name is preferably *.tar.gz

-V: Displays the file name being processed during the compression/decompression process

-F FileName: The file name to be processed immediately after-F

-C Directory: This option is used for decompression, which can be used in specific directory decompression

-P: (lowercase p) retains the original permissions and attributes of the backup data, typically used to back up important configuration files, important parameters

-P: (uppercase P) retains absolute path, allowing the backup data to contain the root directory exists

--exclude=file: During compression, do not package FILE

Tip: How to extract a single file within a package

Tar-jtv-f directory/file name. tar.bz2 | grep ' Find the string '

grep is the ability to search for keywords after locating the target directory

Tar-jxv-f package file name. tar.bz2 Unlock target directory

A way to package a directory without some files in that directory

Tar-jcv-f/root/etc.tar.bz2--exclude=/root/etc* >--exclude=/root/etc.tar.bz2/etc/root

Backup only new files than at some point

--newer Options and--newer-mtime

--newer indicates that the Mtime and CTime are later included.

The--newer-mtime is only mtime

Use FIND/ETC-NEWER/ETC/PASSWD to find out more new files

Time to find a target file

Tar-jcv-f/root/etc.tar.bz2 >--newer-mtime= "2011/10/3"/etc/*

Tarfile,tarballtarfile

Only use the TAR directive to package files that are not compressed

Tarball

Files packaged and compressed using the TAR directive

Methods of using the TAR command to be/dev/st0 to a tape drive

Tar-cv-f/dev/st0/home/root/etc

Using pipeline command and data flow backup

It's the side pack. Unzip to the target directory

Cd/tmp

TAR-CVF-/ETC|TAR-XVF-

That is: Copy the information under/etc directly to the directory where the path is/tmp

File compression and Packaging---compress,gzip,zcat,bzip2,bzcat,tar,find,tarfile,tarball under Linux