Chat with AIExam 11: Compression, System Backup, and Software Installation
When using the compress utility, each file specified for compression is renamed with what extension?
(37) 
VerifiedD
Describe the difference between full and incremental backups. Explain how both might be used to implement a back-up strategy, mentioning how the dump/restore utility can assist in this implementation. Provide an example.
(46) VerifiedAlthough the dump/restore utility can be used to back up only certain files and directories, it was designed to back up entire filesystems to an archive and keep track of these filesystems in a file called /etc/dumpdates. Because archiving all data on a filesystem (known as a full backup) might take a long time, you can choose to perform a full backup only on weekends and incremental backups each evening during the week. An incremental backup backs up only the data that has been changed since the last backup. In the case of a system failure, you can restore the information from the full backup and then restore the information from all subsequent incremental backups in sequential order. You can perform up to nine different incremental backups using the dump/restore utility; number 0 represents a full backup, whereas numbers 1 through 9 represent incremental backups.
Suppose, for example, that you perform a full backup of the /dev/sda3 filesystem on Sunday, perform incremental backups from Monday to Wednesday, and on Thursday the /dev/sda3 filesystem becomes corrupted. After the filesystem has been re-created, you should restore the full backup (0) followed by the first incremental backup (1), the second incremental backup (2), and the third incremental backup (3) to ensure that data has been properly recovered.
A(n) ____________________ backup backs up only the data that has been changed since the last backup.
(38) Verifiedincremental
The cpio command has the ability to handle long filenames and can be used to back up device files.
(30) Match each correct item with the statement below.
a.Aptitude
b.bunzip2 command
c.checksum
d.compression ratio
e.gunzip command
f.package group
g.restore command
h.system backup
i.tarball
j.zmore command
-A utility that can be used to manage DPM packages using a graphical interface.
(29) What option can be added to the rpm command to upgrade a specified package only if an older version exists on the system?
(44) When backing up a system, what type of files should be archived, and what types should not?
(36) Match each correct item with the statement below.
a.Aptitude
b.bunzip2 command
c.checksum
d.compression ratio
e.gunzip command
f.package group
g.restore command
h.system backup
i.tarball
j.zmore command
-A command used to decompress files compressed by the bzip2 command
(35) The dump/restore utility is limited to a maximum of how many different incremental backups?
(39) Because the Makefile often includes some documented items, it is good form to read the Makefile after running the configure script.
(26) The compress utility preserves the original ownership, modification, and access time for each file that it compresses.
(40) Files with what two file extensions are commonly known as tarballs?
(38) An RPM package can be converted to a cpio archive using what command?
(41) What command can be used to search for DPM package information?
(29) Match each correct item with the statement below.
a.Aptitude
b.bunzip2 command
c.checksum
d.compression ratio
e.gunzip command
f.package group
g.restore command
h.system backup
i.tarball
j.zmore command
-The amount of compression that occurred during compression algorithm.
(42) Match each correct item with the statement below.
a.Aptitude
b.bunzip2 command
c.checksum
d.compression ratio
e.gunzip command
f.package group
g.restore command
h.system backup
i.tarball
j.zmore command
-A group of RPM packages that are commonly installed to provide a specific function on the system.
(32) Match each correct item with the statement below.
a.Aptitude
b.bunzip2 command
c.checksum
d.compression ratio
e.gunzip command
f.package group
g.restore command
h.system backup
i.tarball
j.zmore command
-The process whereby files are copied to an archive.
(36) What two commands below can be used to view the contents of a bzip2-compressed file page by page?
(35) What yum command below can display a list of package group names?
(34) 
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