Author: author_sujit

Different compression commands use a different type of compression algorithms. Similarly, bzip2 uses Burrows-Wheeler block sorting text compression algorithm along with Huffman coding. We already covered below similar commands 13 Zip and Unzip command examples in Linux/Unix 7 Linux/Unix gzip and gunzip command examples In this post, we will see how to use the bzip2 command. Syntax for bzip2 command in Linux bzip2 [OPTIONS] [FILENAME] The bzip2 command compresses the files to their corresponding bzip2 file, by default replacing the original file by original_name.bz2. The compressed files retain the permissions, modification date and ownership of the original files, when possible.   Note: bzip has a perfect compression ratio. Hence it is efficiently used to compress the backup files like tar to disk management. Example 1: To compress a single file within a directory. To remind again, this will replace the original file. sujit@sujitkumar:~/default$ ls -l apac* -rw-r--r-- 1 sujit sujit 637 Mar 27 13:45 apache2 sujit@sujitkumar:~/default$ bzip2 apache2 sujit@sujitkumar:~/default$ ls -l apac* -rw-r--r-- 1 sujit sujit 407 Mar 27 13:45 apache2.bz2 Example 2: Though the compressed file usually will have a format of original_name.bz2, but we can provide a custom name for our compressed file by using ‘-c’ option. sujit@sujitkumar:~/default$ bzip2 -kvc apache2 > apac.bz2 apache2: 1.565:1, 5.111 bit's/byte, 36.11% saved, 637 in, 407 out. sujit@sujitkumar:~/default$ ls -l apac* -rw-rw-r-- 1 sujit sujit 407 Mar 27 15:55 apac.bz2 -rw-r--r--...