08. Backup Compression Command

? Gzip Compress (unzip) file or directory, zip file suffix to gzbzip2 compressing (extracting) files or directories with a compressed file suffix of bz2tar file, directory hit (solution) packagegzip command

Command format:

? gzip [option] compress (unzip) the file name

Parameters:

?-d Unzip the compressed file.?-l for each compressed file, display the size of the compressed file, the size of the uncompressed file, the compression ratio, the name of the uncompressed file?-V for each compression and decompression of the file, the display file name and compression ratio.-num Adjust the speed of compression with the specified number num,- 1 or--fast represents the fastest compression method (low compression ratio), 9 or--best represents the slowest compression method (high compression ratio). The system default value is 6------------------------------------------------------------------------------------------------------------------ --------------------bzip2 Command

Command format:

bzip2 [-cdz] File name

Parameters:

?-D: Uncompressed parameters?-Z: Compressed parameters?-num Adjusts the speed of compression with the specified number num, 1 or--fast represents the fastest compression method (low compression ratio), 9 or--best represents the slowest compression method (high compression ratio). The system default value is 6------------------------------------------------------------------------------------------------------------------ --------------------tar command

Command format:

? tar [-CXZJVF] compress the name of the packaged document to back up the directory

Parameters:

?-C: Create an archive parameter directive?-X: Unlocks a compressed file parameter directive!?-z: Do I need to use gzip compression??-J: Do I need to compress with bzip2??-V: Compress the process of displaying files?-F: Use the file name, immediately after F to receive the filename?-TF: View File inside the document file

08. Backup Compression Command