bzip2 Linux Commands
What is Linux bzip2 Command?
Explanation
bzip2 COMMAND: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 ] filenamesOPTIONS:
- c
Compress or decompress to standard output.
- d
Force decompression.
- z
The complement to -d. Force compression.
- t
Performs the integrity test. It performs a trial decompression test and prints the result.
- f
Force overwrite of output file.
- k
Keep the original file. dont delete the input file during compression or decompression.
- q
Quiet, suppress non-essential warning messages.
- s
Reduce memory usage, for compression,decompression and testing.
- v
verbose mode shows the compression ratio for each file processed.
- V
Displays the version of the software.
- L
Displays the license terms and conditions.
- 1
Performs fast compression,creating a relatively large files.
- 9
Get the best possible compression.
EXAMPLE:
- To Compress a file using bzip2:
Lets have a text file as an example.
$ ls -l
-rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt
$ bzip2 -c -1 hiox.txt > hiox.txt.bz2
$ ls -l
-rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt
-rw-rw-r-- 1 hiox hiox
17706 Sep 27 12:38 hiox.txt.bz2
From the above example it is clear that the filesize is reduced from 9150000 bytes to 17706.
When the File is reduced with option -9 the filesize still gets reduced.
$ bzip2 -c -9 hiox.txt > hscripts.txt.bz2
$ ls -l
-rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt
-rw-rw-r-- 1 hiox hiox
17706 Sep 27 12:38 hiox.txt.bz2
-rw-rw-r-- 1 hiox hiox
2394 Sep 27 13:01 hscripts.txt.bz2
When the file is compressed with -1 the size was 17706 bytes and now the filesize is 2394 bytes. The 9 makes best compression but the default is 6.
bzip2 [ options ] filenames
OPTIONS:
- c
Compress or decompress to standard output.
- d
Force decompression.
- z
The complement to -d. Force compression.
- t
Performs the integrity test. It performs a trial decompression test and prints the result.
- f
Force overwrite of output file.
- k
Keep the original file. dont delete the input file during compression or decompression.
- q
Quiet, suppress non-essential warning messages.
- s
Reduce memory usage, for compression,decompression and testing.
- v
verbose mode shows the compression ratio for each file processed.
- V
Displays the version of the software.
- L
Displays the license terms and conditions.
- 1
Performs fast compression,creating a relatively large files.
- 9
Get the best possible compression.
EXAMPLE:
- To Compress a file using bzip2:
Lets have a text file as an example.
$ ls -l
-rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt
$ bzip2 -c -1 hiox.txt > hiox.txt.bz2
$ ls -l
-rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt
-rw-rw-r-- 1 hiox hiox
17706 Sep 27 12:38 hiox.txt.bz2
From the above example it is clear that the filesize is reduced from 9150000 bytes to 17706.
When the File is reduced with option -9 the filesize still gets reduced.
$ bzip2 -c -9 hiox.txt > hscripts.txt.bz2
$ ls -l
-rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt
-rw-rw-r-- 1 hiox hiox
17706 Sep 27 12:38 hiox.txt.bz2
-rw-rw-r-- 1 hiox hiox
2394 Sep 27 13:01 hscripts.txt.bz2
When the file is compressed with -1 the size was 17706 bytes and now the filesize is 2394 bytes. The 9 makes best compression but the default is 6.
| - c | Compress or decompress to standard output. |
| - d | Force decompression. |
| - z | The complement to -d. Force compression. |
| - t | Performs the integrity test. It performs a trial decompression test and prints the result. |
| - f | Force overwrite of output file. |
| - k | Keep the original file. dont delete the input file during compression or decompression. |
| - q | Quiet, suppress non-essential warning messages. |
| - s | Reduce memory usage, for compression,decompression and testing. |
| - v | verbose mode shows the compression ratio for each file processed. |
| - V | Displays the version of the software. |
| - L | Displays the license terms and conditions. |
| - 1 | Performs fast compression,creating a relatively large files. |
| - 9 | Get the best possible compression. |
- To Compress a file using bzip2:
Lets have a text file as an example.$ ls -l -rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt $ bzip2 -c -1 hiox.txt > hiox.txt.bz2 $ ls -l -rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt -rw-rw-r-- 1 hiox hiox
17706 Sep 27 12:38 hiox.txt.bz2
From the above example it is clear that the filesize is reduced from 9150000 bytes to 17706. When the File is reduced with option -9 the filesize still gets reduced.$ bzip2 -c -9 hiox.txt > hscripts.txt.bz2 $ ls -l -rw-rw-r-- 1 hiox hiox 9150000 Sep 26 18:37 hiox.txt -rw-rw-r-- 1 hiox hiox
17706 Sep 27 12:38 hiox.txt.bz2 -rw-rw-r-- 1 hiox hiox
2394 Sep 27 13:01 hscripts.txt.bz2
When the file is compressed with -1 the size was 17706 bytes and now the filesize is 2394 bytes. The 9 makes best compression but the default is 6.
