Chapter 1
A system administrator can automate the installation of Red Hat Enterprise Linux using a feature called this.
Kickstart
Suppose that a user was looking through the following file of data:
cat
dog
concatenate
dogma
category
educated
boondoggle
vindication
chilidog
Applying the regular expression ^dog to the data would yield the following matches:
dog dogma
This is one of the older, but most widely used text editor for any given Linux system.
vi
One of the solutions available to users of a Red Hat Enterprise Linux system for scheduling future tasks is this.
at
The way Linux (and other operating systems) can actually run more processes (and threads) than there are actual processing units available is by employing a technique called this.
time-slicing
This is the Red Hat installer that needs to be told how to install a system: partition disks, configure network interfaces, select which packages to install, etc.
Anaconda
Given the following file of data:
cat
dog
coat
cunning
court
dogma
basketball
If you used c.*t as the regular expression while searching this file, then what results would show?
cat
coat
court
The version of vi that is shipped with Red Hat Enterprise Linux 7 is called this.
vim
One can use this command to view an overview of the pending jobs for that given user.
atq or at -l
The part of the Linux kernel that performs the rapid switching between processes on a single core (giving a user the impression that there are more processes running at the same time) is called this.
process scheduler
You can create a Kickstart configuration file with this utility.
system-config-kickstart
Regular expressions use this character as the unrestricted wildcard character.
. (dot character)
True or false: RHEL is limited to only the vi and vim text editors.
False
When looking at the following command:
[student@desktopX ~]$ atq
28 Mon Feb 2 05:13:00 2015 a student
29 Mon Feb 3 16:00:00 2014 h student
27 Tue Feb 4 12:00:00 2014 a student
How many jobs are there? What are the job numbers? What is the user?
3 jobs
28, 29, 27
student
This is the range of nice levels.
-20 to 19
You can modify an existing Kickstart configuration file with a text editor and check its syntax with this.
ksvalidator
What command can be used to fetch the word “test” from /var/log/test
grep ‘test’ /var/log/test
This key (inside of vim) is used to undo an action.
u
This command can be used to remove a scheduled job.
atrm <job number>
_____ (higher or lower) nice levels indicate less priority (the process easily gives up its CPU usage for others), while ______ (higher or lower) nice levels indicate a higher priority (the process is less inclined to give up the CPU).
Higher and lower
The Anaconda installer creates a file called this that contains the Kickstart directives that can be used to generate the freshly installed system.
/root/anaconda-ks.cfg
Which option of grep allows one to search for data matching the regular expression recursively to a group of files or directories?
-r
This key (inside of vim) is used to save and quite the current file.
:wq
What is preferred over at for scheduling recurring jobs?
cron
Which user is allowed to set negative nice levels and lower the existing nice level on existing processes?
root