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Linux Interview Questions and Answers
In order to run fsck on the root partition, the root
partition must be mounted as
readonly
You cannot run fsck on a partition that is mounted as
read-write.
In order to improve your system's security you decide to
implement shadow passwords. What command should you use?
pwconv
The pwconv command creates the file /etc/shadow and
changes all passwords to 'x' in the /etc/passwd file.
Bob Armstrong, who has a username of boba, calls to tell
you he forgot his password. What command should you use
to reset his command?
passwd boba
The passwd command is used to change your password. If
you do not specify a username, your password will be
changed.
The top utility can be used to change the priority of a
running process? Another utility that can also be used
to change priority is ___________?
nice
Both the top and nice utilities provide the capability
to change the priority of a running process.
What command should you type to see all the files with
an extension of 'mem' listed in reverse alphabetical
order in the /home/ben/memos directory.
ls -r /home/ben/memos/*.mem
The -c option used with ls results in the files being
listed in chronological order. You can use wildcards
with the ls command to specify a pattern of filenames.
What file defines the levels of messages written to
system log files?
kernel.h
To determine the various levels of messages that are
defined on your system, examine the kernel.h file.
What command is used to remove the password assigned to
a group?
gpasswd -r
The gpasswd command is used to change the password
assigned to a group. Use the -r option to remove the
password from the group.
What command would you type to use the cpio to create a
backup called backup.cpio of all the users' home
directories?
find /home | cpio -o > backup.cpio
The find command is used to create a list of the files
and directories contained in home. This list is then
piped to the cpio utility as a list of files to include
and the output is saved to a file called backup.cpio.
What can you type at a command line to determine which
shell you are using?
echo $SHELL
The name and path to the shell you are using is saved to
the SHELL environment variable. You can then use the
echo command to print out the value of any variable by
preceding the variable's name with $. Therefore, typing
echo $SHELL will display the name of your shell.
What type of local file server can you use to provide
the distribution installation materials to the new
machine during a network installation?
A) Inetd
B) FSSTND
C) DNS
D) NNTP
E) NFS
E - You can use an NFS server to provide the
distribution installation materials to the machine on
which you are performing the installation. Answers a, b,
c, and d are all valid items but none of them are file
servers. Inetd is the superdaemon which controls all
intermittently used network services. The FSSTND is the
Linux File System Standard. DNS provides domain name
resolution, and NNTP is the transfer protocol for usenet
news.
If you type the command cat dog & > cat what would you
see on your display? Choose one:
a. Any error messages only.
b. The contents of the file dog.
c. The contents of the file dog and any error messages.
d. Nothing as all output is saved to the file cat.
d
When you use & > for redirection, it redirects both the
standard output and standard error. The output would be
saved to the file cat.
You are covering for another system administrator and
one of the users asks you to restore a file for him. You
locate the correct tarfile by checking the backup log
but do not know how the directory structure was stored.
What command can you use to determine this?
Choose one:
a. tar fx tarfile dirname
b. tar tvf tarfile filename
c. tar ctf tarfile
d. tar tvf tarfile
d
The t switch will list the files contained in the
tarfile. Using the v modifier will display the stored
directory structure.
You have the /var directory on its own partition. You
have run out of space. What should you do? Choose one:
a. Reconfigure your system to not write to the log
files.
b. Use fips to enlarge the partition.
c. Delete all the log files.
d. Delete the partition and recreate it with a larger
size.
d
The only way to enlarge a partition is to delete it and
recreate it. You will then have to restore the necessary
files from backup.
You have a new application on a CD-ROM that you wish to
install. What should your first step be?
Choose one:
a. Read the installation instructions on the CD-ROM.
b. Use the mount command to mount your CD-ROM as
read-write.
c. Use the umount command to access your CD-ROM.
d. Use the mount command to mount your CD-ROM as
read-only.
d
Before you can read any of the files contained on the
CD-ROM, you must first mount the CD-ROM.
When you create a new partition, you need to designate
its size by defining the starting and ending
_____________.
cylinders
When creating a new partition you must first specify its
starting cylinder. You can then either specify its size
or the ending cylinder.
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