bunzip2 - a block-sorting file compressor
1. To compress file input.txt it deletes original
$ bzip2 -z input.txt
will give input.txt.bz2 (Refer image).
2. To decompress the input.txt.bz2
$ bzip2 -d input.txt.bz2
3. To compress file input.txt but does not deletes the original file.
$ bzip2 -k input.txt
4. To check the integrity of file and to check file is corrupt or not
$ bzip2 -t input.txt.bz2
5. To show the compression ratio for each file processed in verbose mode
$ bzip2 -v input.txt
