Linux Learning Notes

1. Linux disk and file system Management --not learned

2. common compression commands for Linux systems

2.1 Common Compressed file extensions *.tar, *.tar.gz, *.tgz, *.gz, *. Z, *.bz2

*. Z Compress program compressed files, obsolete;

*.gz gzip program compressed files;

*.BZ2 bzip2 program compressed files;

*.tar the TAR program to package the data, and has not been compressed;

*.tar.gz tar program packaged files, which are also compressed by gzip

*.TAR.BZ2 tar program packaged files, which are bzip2 compressed

2.2 gzip [-cdtv#] File

-C: Output compressed data to the screen, can be processed through data flow redirection;

-D: the extracted parameters;

-T: can be used to verify the consistency of a compressed file ~ See if there are errors;

-V: can display the original file/compressed file compression ratio and other information;

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

Example: Gzip-v pafa.log compression

gzip-d pafa.log.gz Decompression

Gzip-c pafa.log > pafa.log.gz Compress and keep the original file

Zcat file. gz

Example: Zcat pafa.log.gz Read Compressed file contents

bzip2 [-cdkzv#] File

-C: Output the data generated by the compression process to the screen!

-D: decompressed parameters

-K: retains the original file without deleting the original file Oh!

-Z: Compressed parameters

-V: can display the original file/compressed file compression ratio and other information;

-#: Same as gzip, all in the calculation of compression ratio parameters,-9 best,-1 fastest! 6, yes.

Example: Bzip2-z pafa.log compression

bzip2-d pafa.log.bz2 Decompression

Linux Learning Notes