Compression using 7z

ultra = 7z a -t7z /home/file.7z /home/file -mx9
max = 7z a -t7z /home/file.7z /home/file -mx7
normal = 7z a -t7z /home/file.7z /home/file -mx5
fast = 7z a -t7z /home/file.7z /home/file -mx3
fastest = 7z a -t7z /home/file.7z /home/file -mx1
no = 7z a -t7z /home/file.7z /home/file -mx0

to extract
7z x file.7z