Features:
1. Compression utilities (gzip, bzip2, zip)
2. File rollers (the ability to represent many files as one)
Gzip:
Includes:
1. gzip – compresses/decompresses files
2. gunzip – decompresses gzip files
Tasks:
1. compress ‘1million.txt’ file using gzip
a. gzip -c 1million.txt > 1million.txt.gz
Note: gzip auto-dumps to STDOUT, by default
b. gzip -l 1million.txt.gz – returns status information
c. gunzip 1million.txt.gz – dumps to file, and removes compressed version
d. gzip -d 1million.txt.gz
e. zcat 1million.txt.gz – dumps the contents to STDOUT zcat file.gz > file2.txt
f. less 1million.txt.gzip – dumps the contents of gzip files to STDOUT
Bzip2: better compress
- bzip2 -c 1million.txt > 1million.txt.bz2
Note: Bzip2 tends to outperform gzip on larger files
2. bunzip2 1million.txt.bz2
3. bzip2 -d 1million.txt.bz2
4. bzcat 1million.txt.bz2 – dumps contents to STDOUT
5. less 1million.txt.bz2 – also dumps the contents to STDOUT
Zip & unzip:
1. zip filename.zip path/ – general usage
2. zip 1million.txt.zip 1million.txt
Note: zip differs slight from gzip and bzip2 in that the destination file (resultant zip file) is specified before the source
- unzip 1million.txt.zip
Tar & Gzip/Bzip2:
1. tar -cvf filename.tar path/ – creates a non-compressed archive
- tar -cvf 1million.txt.tar 1million.txt
Note: tar, requires a small overhead for itself in each file
3. tar -czvf 1million.txt.tar.gz 1million.txt – creates, tar/gzip document
4. tar -cjvf 1million.txt.tar.bz2 1million.txt – creates, tar/bzip2 document
- tar -tzvf display archive content
- tar -xzvf extract archive content
6. tar -cjvf 1million.txt.tar.bz2 1million.txt testRH5/- creates, tar/bzip2 document for the text file and ‘testRH5′ directory tree
Tags: RHCE
