p7zip - 7z file archiver with high compression ratio

安裝

shell> brew install p7zip
shell> apt-get install p7zip-full

shell> 7z a filename.7z filename
shell> 7z a filename.7z filename -pPassword
shell> 7z x filename.7z
shell> 7z x filename.7z -odir1
shell> tar cf - directory | 7z a -si directory.tar.7z
shell> 7z x -so directory.tar.7z | tar xf -