Linux Study Notes 4 compression and decompression commands

Linux Study Notes 4-compressed and decompressed commands links: Linux Study Notes 1 file Operation Commands http://www.2cto.com/os/201211/169196.html Linux study Note 2 permission management commands http://www.2cto.com/os/201211/169485.html Linux learning notes... Linux learning Notes 4. compression and decompression commands links: Linux learning Notes 1 file Operation Commands http://www.2cto.com/os/201211/169196.html Linux study Note 2 permission management commands http://www.2cto.com/os/201211/169485.html Linux learning Note 3 file search command http://www.2cto.com/os/201211/169489.html 1. compressed file www.2cto.com gzip the format of the compressed file is .gz. Features: only files can be compressed and directories cannot be compressed; do not retain the gzip file name of the source file [root @ CentOS-Test data] # gzip xx_lhc.txt [root @ CentOS-Test data] # ls bak lost + found testdir1 testdir2 xx_lhc.txt.gz2. decompress the file [root @ CentOS-Test data] # gzip-d xx_lhc.txt.gz [root @ CentOS-Test data] # ls bak lost + found testdir1 testdir2 xx_lhc.txt3, and the tar package directory name is the .tar.gz tar parameter: -c: .tar package file-v: Show Details-f: specify the compressed file name-z: package and compress [root @ CentOS-Test data] # tar-zcvf newdir.tar.gz testdir1 testdir1/but use file filename to determine the file type. not supported, however, first package and then compress [root @ CentOS-Test data] # tar-cvf xx_lhc.tar xx_lhc.txt [root @ CentOS-Test data] # gzip xx_lhc.tar4, decompress the tar command in the folder, and extract the parameter-x: decompress the. tar file-f: specifies the decompressed file-v: displays details-z: decompress [root @ CentOS-Test data] # tar-xzvf xx_lhc.tar.gz xx_lhc.txt zip compression command, you can not only compress files, but also compress directories (using the-r parameter). the source files still exist when the files are compressed, for example, compressed files: [root @ CentOS-Test data] # zip xx_lhc.zip xx_lhc.txt adding: xx_lhc.txt (deflated 22%) 22% is the compression ratio [root @ CentOS-Test data] # ll-rw-r --. 1 root 428 November 18 20:00 xx_lhc.txt-rw-r --. 1 root 502 November 18 21:30 xx_lhc.zip compression directory for example: [root @ CentOS-Test data] # zip-r bak.zip bak adding: bak/(stored 0%) adding: bak/lhc.txt (deflated 22%) adding: bak/Li Haichao personal information .txt (deflated 22% ). zip-format decompression command: the unzip zip package name bzip2zip command, the zip file is relatively large, the compression ratio is very high, the format is .bz2, only the file can be compressed, use the-k parameter to retain the original file name [root @ CentOS-Test data] # bzip2-k xx_lhc.txt-rw-r --. 1 root 378 November 18 20:00 xx_lhc.txt.bz2 uncompress the file in the .bz2 format [root @ CentOS-Test data] # bunzip2 xx_lhc.txt.bz2