Both Linux and UNIX include various commands for Compressing and decompresses.
Compressing files
| Syntax | Description | Example(s) |
| gzip {filename} | Gzip compress the size of the given files using Lempel-Ziv coding (LZ77). Whenever possible, each file is replaced by one with the extension .gz. | gzip mydata.doc gzip *.jpg ls -l |
| bzip2 {filename} | bzip2 compresses files using the Burrows-Wheeler block sorting text compression algorithm, and Huffman coding. Compression is generally considerably better than that achieved by bzip command (LZ77/LZ78-based compressors). Whenever possible, each file is replaced by one with the extension .bz2. | bzip2 mydata.doc bzip2 *.jpg ls -l |
| zip {.zip-filename} {filename-to-compress} | zip is a compression and file packaging utility for Unix/Linux. Each file is stored in single .zip {.zip-filename} file with the extension .zip. | zip mydata.zip mydata.doc zip data.zip *.doc ls -l |
| tar -zcvf {.tgz-file} {files} tar -jcvf {.tbz2-file} {files} | The GNU tar is archiving utility but it can be use to compressing large file(s). GNU tar supports both archive compressing through gzip and bzip2. If you have more than 2 files then it is recommended to use tar instead of gzip or bzip2. -z: use gzip compress -j: use bzip2 compress | tar -zcvf data.tgz *.doc tar -zcvf pics.tar.gz *.jpg *.png tar -jcvf data.tbz2 *.doc ls -l |
Decompressing files
| Syntax | Description | Example(s) |
| gzip -d {.gz file} gunzip {.gz file} | Decompressed a file that is created using gzip command. File is restored to their original form using this command. | gzip -d mydata.doc.gz gunzip mydata.doc.gz |
| bzip2 -d {.bz2-file} bunzip2 {.bz2-file} | Decompressed a file that is created using bzip2 command. File is restored to their original form using this command. | bzip2 -d mydata.doc.bz2 gunzip mydata.doc.bz2 |
| unzip {.zip file} | Extract compressed files in a ZIParchive. | unzip file.zip unzip data.zip resume.doc |
| tar -zxvf {.tgz-file} tar -jxvf {.tbz2-file} | Untar or decompressed a file(s) that is created using tar compressing through gzip and bzip2 filter | tar -zxvf data.tgz tar -zxvf pics.tar.gz *.jpg tar -jxvf data.tbz2 |
List the contents of an archive/compressed file
Some time you just wanted to look at files inside an archive or compressed file. Then all of the above command supports file list option.
| Syntax | Description | Example(s) |
| gzip -l {.gz file} | List files from a GZIP archive | gzip -l mydata.doc.gz |
| unzip -l {.zip file} | List files from a ZIP archive | unzip -l mydata.zip |
| tar -ztvf {.tar.gz} tar -jtvf {.tbz2} | List files from a TAR archive | tar -ztvf pics.tar.gz tar -jtvf data.tbz2 |
No comments:
Post a Comment
Note: only a member of this blog may post a comment.