File Compression

Zip and tar files; file compression and decompression

Functions

`zip`	Compress files into zip file
`unzip`	Extract contents of zip file
`gzip`	Compress files into GNU zip files
`gunzip`	提取GNU zip文件的内容
`tar`	Compress files into tar file
`untar`	Extract contents of tar file

Create archives using zip files to back up files, conserve file storage space, or to share collections of files with others.