The gzip command
Yaser Rahmati | یاسر رحمتی
The gzip command in Linux/Unix is used to compress/decompress data.
1. Compress a file
Action:
Compressing a file
Details:
Reduce the size of the file by applying compression
Command:
[root@academy mydir]# truncate -s 20M myfile.txt
[root@academy mydir]# ls -ltrh
total 0
-rw-r--r--. 1 root root 20M Dec 22 23:00 myfile.txt
[root@academy mydir]# gzip myfile.txt
[root@academy mydir]# ls -ltrh
total 20K
-rw-r--r--. 1 root root 20K Dec 22 23:00 myfile.txt.gz
[root@academy mydir]#
2. Decompress a file
Action:
Decompressing a file
Details:
Restore the file's original form in terms of data and size
Command:
[root@academy mydir]# ls -ltrh
total 20K
-rw-r--r--. 1 root root 20K Dec 22 23:00 myfile.txt.gz
[root@academy mydir]# gzip -d myfile.txt.gz
[root@academy mydir]# ls -ltrh
total 20M
-rw-r--r--. 1 root root 20M Dec 22 23:00 myfile.txt
[root@academy mydir]#
3. Compress multiple files:
Action:
Compress multiple files
Details:
Compress multiple files into multiple archives
Command:
[root@academy mydir]# touch file1.txt file2.txt file3.txt
[root@academy mydir]# ls
file1.txt file2.txt file3.txt
[root@academy mydir]# gzip file1.txt file2.txt file3.txt
[root@academy mydir]# ls
file1.txt.gz file2.txt.gz file3.txt.gz
4. Decompress multiple files:
Action:
Decompress multiple files
Details:
Decompress multiple files from multiple archives
Command:
[root@academy mydir]# ls
file1.txt.gz file2.txt.gz file3.txt.gz
[root@academy mydir]# gzip -d file1.txt.gz file2.txt.gz file3.txt.gz
[root@academy mydir]# ls
file1.txt file2.txt file3.txt
[root@academy mydir]#
5. Compress a directory:
Action:
Compress all the files in a directory
Details:
Compress multiple files under a directory in one single archive
Command:
[root@academy tmp]# ls
ks-script-ggLlAt mydir yum.log
[root@academy tmp]# ls ./mydir
file1.txt file2.txt file3.txt
[root@academy tmp]# gzip -r mydir
[root@academy tmp]# ls
ks-script-ggLlAt mydir yum.log
[root@academy tmp]# ls ./mydir
file1.txt.gz file2.txt.gz file3.txt.gz
[root@academy tmp]#
6. Decompress a directory:
Action:
Decompress all the files in a directory
Details:
Decompress multiple files under a directory from one single archive
Command:
[root@academy tmp]# ls
ks-script-ggLlAt mydir yum.log
[root@academy tmp]# ls ./mydir
file1.txt.gz file2.txt.gz file3.txt.gz
[root@academy tmp]# gzip -dr mydir/
[root@academy tmp]# ls ./mydir
file1.txt file2.txt file3.txt
[root@academy tmp]#
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