Method 1
Step 1: Group the file you need to compress by using tar command.
root@bt:~/fw-scripts# tar -cf firewall.tar firewall.sh root@bt:~/fw-scripts# ls -la total 24 drwxr-xr-x 2 root root 4096 2011-08-04 00:35 . drwx------ 33 root root 4096 2011-08-04 00:00 .. -rwxr--r-- 1 root root 967 2011-08-03 01:42 firewall.sh -rw-r--r-- 1 root root 10240 2011-08-04 00:35 firewall.tar
Step 2: Use an archiver of your choice. Use gzip.
root@bt:~/fw-scripts# gzip -9 firewall.tar root@bt:~/fw-scripts# ls -la total 16 drwxr-xr-x 2 root root 4096 2011-08-04 00:37 . drwx------ 33 root root 4096 2011-08-04 00:00 .. -rwxr--r-- 1 root root 967 2011-08-03 01:42 firewall.sh -rw-r--r-- 1 root root 485 2011-08-04 00:35 firewall.tar.gz
Use bzip2.
root@bt:~/fw-scripts# bzip2 firewall.tar root@bt:~/fw-scripts# ls -la total 16 drwxr-xr-x 2 root root 4096 2011-08-04 00:39 . drwx------ 33 root root 4096 2011-08-04 00:00 .. -rwxr--r-- 1 root root 967 2011-08-03 01:42 firewall.sh -rw-r--r-- 1 root root 519 2011-08-04 00:38 firewall.tar.bz2
To make the compression better:
root@bt:~/fw-scripts# bzip2 --best firewall.tar
This is the same as gzip -9 option. You can simply compress a tar file with only the gzip command without any options.
Decompress the files
For bzip2:
root@bt:/tmp# bzip2 -d firewall.tar.bz2 root@bt:/tmp# ls firewall.tar firewall.tar
For gzip:
root@bt:/tmp# gzip -d firewall.tar.gz root@bt:/tmp# ls -l firewall.tar -rw-r--r-- 1 root root 10240 2011-08-04 00:46 firewall.tar
To untar the file:
root@bt:/tmp# tar -xf firewall.tar root@bt:/tmp# ls firewall.* firewall.sh firewall.tar
Check the tar file content before unzip:
root@bt:/tmp# tar -tf firewall.tar firewall.sh
Method 2
Compress with gzip
root@bt:~/fw-scripts# tar -czf firewall.tar.gz firewall.sh root@bt:~/fw-scripts# ls firewall.sh firewall.tar.gz
Compress with bzip2:
root@bt:~/fw-scripts# tar -cjf firewall.tar.bz2 firewall.sh root@bt:~/fw-scripts# ls firewall.sh firewall.tar.bz2 firewall.tar.gz
Note: The f option stands for file, hence it must always be the last letter of your option. You can rearrange tar -czf or tar -zcf it is the same, but f is always the last and immediately follow by f will always be a filename of your compressed file. This works for bzip2 as well.
Compress file with 7zip
Compress your file into zip format:
ot@bt:~/fw-scripts# 7z a firewall.zip firewall.sh 7-Zip 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30 p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,8 CPUs) Scanning Creating archive firewall.zip Compressing firewall.sh Everything is Ok root@bt:~/fw-scripts# ls firewall.sh firewall.tar.bz2 firewall.tar.gz firewall.zip
Compress in bzip2:
root@bt:~/fw-scripts# 7z a firewall.tar.bz2 firewall.sh 7-Zip 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30 p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,8 CPUs) Scanning Creating archive firewall.tar.bz2 Compressing firewall.sh Everything is Ok
Likewise if you want to zip in gzip format is also done the same.
Decompress with 7zip
Decompress zip:
root@bt:/tmp# 7z e firewall.zip 7-Zip 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30 p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,8 CPUs) Processing archive: firewall.zip file firewall.sh already exists. Overwrite with firewall.sh? (Y)es / (N)o / (A)lways / (S)kip all / A(u)to rename all / (Q)uit? y Extracting firewall.sh Everything is Ok Size: 967 Compressed: 475
Decompress bzip2:
ot@bt:/tmp# 7z e firewall.tar.bz2 7-Zip 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30 p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,8 CPUs) Processing archive: firewall.tar.bz2 file firewall.tar already exists. Overwrite with firewall.tar? (Y)es / (N)o / (A)lways / (S)kip all / A(u)to rename all / (Q)uit? y Extracting firewall.tar Everything is Ok Size: 967 Compressed: 425
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