File compression gzip/gunzip/Bzip2/bunzip2/tar

Gzip gunzip common compressed files

Simple commands-simple operations. Linux compression Tool

[[Email protected] huxiaoming] # gzip 123.txt # gzip directly compresses the source file without retaining the source file #

[[Email protected] huxiaoming] # ls

123.txt.gz 2.txt shuzu. Sh software_list.log

[[Email protected] huxiaoming] # gunzip 123.txt.gz # vice versa #

[[Email protected] huxiaoming] # ls

1 123.txt 2.txt shuzu. Sh software_list.log

Bzip bunzip-higher compression rate, available in new Linux versions

[[Email protected] huxiaoming] # Bzip2 123.txt

[[Email protected] huxiaoming] # ls

1 123.txt.bz2 2.txt shuzu. Sh software_list.log

[[Email protected] huxiaoming] # bunzip2 123.txt.bz2

[[Email protected] huxiaoming] # ls

1 123.txt 2.txt shuzu. Sh software_list.log

Tar-file archiving

Examples:

Tar-CF archive.tar Foo bar # create archive.tar from files Foo and bar.

Tar-tvf archive.tar # list all files in archive.tar verbosely.

Tar-XF archive.tar # extract all files from archive.tar.

Option and parameter:-C: Create a package file. You can use-V to check the file name (filename)-T in the package process. Check the file names contained in the package file, focus on checking the 'file name'.-X: The unpack or decompress function can be used with-C (uppercase) To uncompress a file in a specific directory. Note that-C, -T and-x cannot appear in a string of command columns at the same time. -J: compress/decompress the file with Bzip2 support. In this case, the file name is * .tar.bz2-Z. Compress/decompress the file with gzip support: at this time, the file name should be * .tar.gz-V: During the compression/decompression process, the file name being processed should be displayed! -F filename: name of the file to be processed immediately after-F! -F is recommended to write an option separately! -C Directory: This option is used for decompression. to decompress the package in a specific directory, you can use this option. -P: retains the original permissions and attributes of the backup data. It is often used in backup (-C) important settings-P: retains the absolute path, that is, to allow the backup data to contain the root directory; -- exclude = file: During the compression process, do not package the file!

For example, if I want to compress all the files under/etcinto an etc.tarpackage, use the high compression tool bzip2to compress the file with the suffix .bz2 in/home/huxiaoming.

[Email protected] huxiaoming] # tar cvfj/home/huxiaoming/etc.tar.bz2/etc

650) This. width = 650; "Title =" Clipboard "style =" border-top: 0px; border-Right: 0px; Background-image: none; border-bottom: 0px; padding-top: 0px; padding-left: 0px; margin: 0px; border-left: 0px; padding-Right: 0px; "Border =" 0 "alt =" Clipboard "src =" http://img1.51cto.com/attachment/201408/11/8976580_1407764322HQ1i.png "Height =" 18 "/>

Here we can see the advantage of using the J parameter, the compression ratio is almost 4 times the default

650) This. width = 650; "Title =" Clipboard [1] "style =" border-top: 0px; border-Right: 0px; Background-image: none; border-bottom: 0px; padding-top: 0px; padding-left: 0px; border-left: 0px; padding-Right: 0px; "Border =" 0 "alt =" Clipboard [1] "src =" http://img1.51cto.com/attachment/201408/11/8976580_14077643222XhB.png "Height =" 66 "/>

• Compression: name of the file or directory to be compressed by tar-JCV-F filename.tar.bz2

• Query: tar-jtv-F filename.tar.bz2

• Decompress: tar-jxv-F filename.tar.bz2-C directory to be decompressed

Three Axes

To decompress the tar command, we recommend that you list the-F parameter separately.

[[Email protected] huxiaoming] # tar-jxv-f/home/huxiaoming/etc.tar.bz2-C/home/huxiaoming/backupetc

Review the previous find command to delete the tar file just created

[[Email protected] huxiaoming] # Find/home/huxiaoming/-name "* tar *"-OK RM {}\;

<RM.../home/huxiaoming/etc.tar.bz2>? Yes

<RM.../home/huxiaoming/etc.tar>? Yes

<RM.../home/huxiaoming/backupetc/etc/init/start-ttys.conf>? N

<RM.../home/huxiaoming/backupetc/etc/RedHat-LSB/lsb_start_daemon>? N

<RM.../home/huxiaoming/backupetc/etc/xdg/autostart>? N

<RM.../home/huxiaoming/backupetc/etc/dbus-1/system. d/upstart. conf>? N

<RM.../home/huxiaoming/backupetc/etc/SELinux/targeted>? N

<RM.../home/huxiaoming/backupetc/etc/event. d/CK-log-system-Restart>? N

<RM.../home/huxiaoming/backupetc/etc/event. d/CK-log-system-Start>? N

<RM.../home/huxiaoming/backupetc/etc/libreport/events. d/tarball_event.conf>? N