Liinux Compression and archiving

Compression of files
AAAAAABBBBCCC compression becomes 6A4B3C
Compression tools:
Gzip/gunzip:. gz suffix
Only files can be compressed and directories cannot be compressed because they do not have archiving capabilities
Man gzip: View gzip command Help
Gunzip: Unzip Tool
LS-LH: Viewing File size
Gzip messages: Files that compress source files messages directly to the end of. GZ
Gunzip messages.gz: Re-unzip to file messages

Gzip option file name
-D is also available for decompression
gzip-d messages.gz: Re-unzip to file messages

-C compression while preserving the source file, the compressed data output as standard output, and redirect to the file, you can complete the compression
Gzip-c messages >> messages.gz: So you can have two files, compressed and uncompressed two files exist

-# 1-9 Compression ratio, the larger the number, the greater the compression ratio, the default compression ratio is 6
GZIP-7 messages: Press 7 to compress, the compressed file will be smaller

Zcat messages.gz: Directly read the contents of the file after gzip compression

BZIP2/BUNZIP2:. bz2 suffix
BZIP2 messages: Compressed file is messages.bz2
BUNZIP2 messages.bz2 extract to messages file

bzip2 option file name
-D is also available for decompression
gzip-d messages.gz: Re-unzip to file messages

-K compression preserves the source file, the compressed data output as standard output, and redirect to the file, you can complete the compression
Bzip2-k messages: This can have two files, compressed and uncompressed files exist

-# 1-9 Compression ratio, the larger the number, the greater the compression ratio, the default compression ratio is 6

Bzcat directly read the compressed file contents

Xz/unxz:. xz suffix
XZ messages
Unxz messages.xz

xz option file name
-D implementation unzip
-# 1-9 default is 6, the larger the number the greater the compression scale
-K is retained after compression Source file

Xzcat Direct Read compressed file contents

Zip/unzip:. zip suffix
Not only can compress files, but also can compress directories
Zip etc.zip etc/: Compressed directory etc
Unzip Etc.zip

Zip option after compressing the file name to compress the files or directories
-R compression directory, you must add the option that can be understood as recursive compression

File Archiving tool: Tar suffix for. Tar
Create an archive: The directory is packaged as a file
Tar options archived file name source file name
-C Create archive
-F Specify file name after file
TAR-CF Etc.tar etc/: Archive directory etc/for Etc.tar
-Z call gzip to compress archived files -j call bzip2 to compress the archived files
-j call XZ to compress the archived files
-P remove prompts during the command

Expand archive
Tar options archive file name
-X Expand Archive
-F Specify the file name after the archive
-Z call gzip to unzip the archived file
-j call bzip2 to unzip the archived file
-j call XZ to unzip the archived file
-C Specify the extracted directory
-p to remove the prompt in the process of removing the command
TAR-CF etc.tar/etc/: This will not succeed because it is the ETC
Tar cPf etc.tar/etc/in the root directory: This is a successful
tar xPf etc.tar:p is used to remove the hint

Archive and Compress:
TAR-CF etc.tar etc/: Archive
gzip Etc.tar: Post-compress, get etc.tar.gz
Merge into: tar-zcf etc.tar.gz etc/
Expand Archive: TAR-ZXF etc.tar.gz
bzip2 Etc.tar: Post-compression, get etc.tar.bz

Tar jcf etc.tar.bz2 etc/
Tar jxf etc.tar.bz2-c/home/

Liinux Compression and archiving