SYS: Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2.

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Note: This is an RHCSA 7 exam objective.

To compress a file, type:

# gzip file
# bzip2 file

To uncompress a file, type:

# gunzip file.gz
# bunzip2 file.bz2

To archive and compress a directory (with the SELinux contexts), type:

# tar --selinux -czvf directory.tgz directory

Note: Try to avoid using full path when specifying the directory path, use relative path, it will be easier when restoring.

Alternatively, you can group both operations (tar+compression) in one command (respectively for gzip and bzip2 content):

# tar cvzf directory.tgz directory
# tar cvjf directory.bz2 directory

To unpack and uncompress an archive file (respectively for gunzip and bunzip2 content) (with the SELinux contexts), type:

# tar --selinux xzvf directory.tgz
# tar --selinux xjvf directory.bz2

To list the archive content (respectively for gunzip and bunzip2 content), type:

# tar tzvf directory.tgz
# tar tjvf directory.bz2

To archive a directory with the star command (with the SELinux contexts), type:

# yum install -y star
# star -xattr -H=exustar -c -f=directory.star directory

To unpack a archive file, type:

# star -x -f=directory.star

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7 Comments on "SYS: Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2."

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algorisms
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algorisms

If you are like me and you prefer to remember one command, you can also use the z and j directives with tar for creating compressed archives instead of using bzip2/gzip

Ex:

# tar cvfz archive.tar.gz archive/ #gzip archive creation
# tar cvfj archive.tar.bz2 archive/ #bzip2 archive creation

To some, it’s probably more complex than to use gzip/gunzip etc… But if I can get away with using one command to do multiple things, I always go that route.

pawel
Member
pawel
Just a few minor mistakes I’ve noticed in your article. 1. This will NOT work in the way it should as ‘f’ parameter takes an argument (see manual): -f, –file=ARCHIVE use archive file or device ARCHIVE # tar cvfz directory.tgz directory —> tar cvzf directory.tgz directory # tar cvfj directory.bz2 directory —> tar cvjf directory.bz2 directory 2. You create an archive taking selinux context into account: tar –selinux -czvf directory.tgz directory But later you unpack it without “–selinux” parameter which will unpack the contents without selinux contexts # tar xzvf directory.tgz —> tar –selinux xzvf directory.tgz # tar xjvf directory.bz2… Read more »
Ahmad
Member
Ahmad

Hi,

Can you please help to answer the below:

1-Is FTP a part of RHCSA objectives?
2-Is HTTP a part of RHCSA objectives?
3-Is VNC access a part of RHCSA objectives?
4-Is logrotate a part of RHCSA objectives?

If there are not, what is the required info we should have about them for the RHCSA?

Thanks

wpDiscuz

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