command: bzip2
usage: bzip2 linux command is used to compress the file. Each file is
replaced by a compressed version of itself with .bz2 extension.
syntax: $ bzip2 [options] filename
example:
1. To display info, help and options of this command
$ bzip2 --help
2. To compress a file using bzip2
for example a pdf file 'sample.pdf'
$ ls -l
-rw-rw-r-- 1 dhana dhana 164847 Feb 23 11:24 sample.pdf
$ bzip2 -c -1 sample.pdf > sample.pdf.bz2
$ ls -l
-rw-rw-r-- 1 dhana dhana 164847 Feb 23 11:24 sample.pdf
-rw-rw-r-- 1 dhana dhana 149142 Aug 6 21:16 sample.pdf.bz2
the file size is reduced from 164847 to 149142
by using the option -9 instead of -1 the file gets much reduced
$ bzip2 -c -9 sample.pdf > sample.pdf.bz2
$ ls -l
-rw-rw-r-- 1 dhana dhana 164847 Feb 23 11:24 sample.pdf
-rw-rw-r-- 1 dhana dhana 147879 Aug 6 21:17 sample.pdf.bz2
when using -1 option the file reduced to 149142
when using -9 option the file reduced to 147879
regards,
dhanasekar
