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Embedded Systems means:
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Systems designed to do a specific task on hardware optimized for only that purpose
Linux originally only ran on:
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Intel 386 PCs
Bundling utilities, management tools, and application software with a Linux kernel is called a:
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A distribution of Linux
A software release cycle describes:
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How often upgrades come out for software
Apple’s OS X is:
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A fully certified UNIX distribution, Tightly integrated with Apple hardware, Partially based on code from the FreeBSD project
Microsoft Windows:
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Is generally backwards compatible with previous versions, Offers both desktop and server products, Has a scripting environment called PowerShell
An interpreted programming language:
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Is converted into machine specific instructions as the program runs, Tends to offer more features than compiled languages
The two main families of Linux shells are:
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Bourne Shell, C Shell
In virtualization, what are the host and guest?
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The host is the machine that runs the virtual machines, A guest is a virtual machine
Cloud computing is:
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All are correct
Which of the following are properties of a strong password?
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Includes symbols, At least 10 characters long, A mix of upper and lower case
A license where you don’t have access to the source code is called:
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Closed source
A copyleft provision in a software license means:
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If you redistribute the software, you must distribute the source to any changes you make
The Free Software Foundation believes that:
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Software should be free to modify, Software should be free to share
What does it mean when a work is placed in the public domain?
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The author has relinquished the copyright on the work
The semicolon (;) can be used to separate multiple commands to be
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executed in order. True
To be able to output messages to the screen, use the _______ command:
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echo
The _______ command will print a list of the commands that you’ve previously executed.
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history
HOME is an example of _________.
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An environment variable
The directory where additional documentation for software packages most likely can be found is:
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/usr/share/doc
To start searching a man page, the first key you press is:
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/
To get help on using the info command, execute:
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man info. info info
The _____ command can be used to find any file, not just commands or man pages.
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locate
Hidden files are files that begin with what character?
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A period (.)
The top-level directory on a Linux system is represented as:
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/
The ls command without options or arguments...
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... lists the contents of the current directory.
The command ls -S will sort files:
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By size, largest to smallest
When using the cp command, you must provide both a source and a destination.?
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True
Which option can be used with the rm command to prompt before deleting?
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-i
Which command would list files that do not begin with a “T” or a “W”?
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echo /etc/[! TW]*
In general, for which of the following would you want to use lossless compression?
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A log file
You type gzip myfile. tar. What happens?
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myfile. tar is removed, myfile. tar. gz holds a compressed version of myfile. tar
Which command will show what is inside the compressed tarball with a name of foo. tar. gz?
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tar –tzf foo. tar. gz
By default, the zip command replaces uncompressed files with compressed files.
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True
Error messages generated by commands are sent where by default?
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STDERR
Which of the following commands will display only lines that begin with test?
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grep ^test file. txt
Which of the following commands will display lines that contain either start or end?
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egrep ‘start
A file begins with #!/bin/csh. This means:
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Running the script will invoke /bin/csh to interpret the rest of the file
Most of nano’s commands take the form of
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Control and another character
The if command looks for what exit code to consider a condition to be true?
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0
The number of users logged in is in a variable called USERS. How would you test to see if 5 users are logged in?
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test $USERS –eq 5
Which of the following are valid partitioning types?
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MBR, GPT
Software that allows hardware devices to communicate with the installed operating system is called?
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Drivers
Which of the following commands will check hard disk GPT partitions?
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sgdisk, gdisk. cgdisk
The process (ps) command shows only processes running in the current shell by default.
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True
The free command outputs statistics about:
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Memory usage
Which file contains the information passed to the kernel at boot time?
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/proc/cmdline
To make changes permanent for kernel parameter files found under /proc/sys, the following file can have entries added to it:
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/etc/sysctl.conf
Which of the following commands will display the IP address on a Linux system?
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ifconfig
The RSA key fingerprint allows the dig command to connect to remote systems.?
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False
When issuing the service network restart command, which of the following occurs?
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... takes down all network interfaces, re-reads all related configuration files and then the networking for the system is restarted.
Which of the following commands can be used to display socket statistics, and supports all major packet and socket types?
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ss
Which of the following commands will display the groups that the user bob belongs to?
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id bob
Traditional UNIX systems allowed users to belong to how many groups?
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16
A value of 0 in the “minimum” password aging field means the user cannot change their password.
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False
Sudo privileges allow users to execute commands as another user?
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True
The first line of this command displays how long the system has been running since being rebooted.
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w
Which option for the usermod command can be used to specify a user’s group ID (either primary or secondary)?
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-g,-G
The groupmod command can be used to add users to a group.
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False
Which of the following files contains user IDs?
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/etc/passwd
Which of the following commands, run as root, will prevent the user bob from logging in?
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usermod -L bob
What directory contains a user’s home directory?
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/home
GIDs under 500 (or 1000) are usually reserved for what kind of groups?
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System use
A user cannot delete a file if they do not own it.
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False
The chown command permits changing group ownership done by root only.
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False
Which of the following commands will list hidden files as well as their ownership?
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ls -la
Which of the following commands will set setuid for /usr/bin/program?
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chmod 4755 /usr/bin/program
Setting setgid on a directory...
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... will set the group owner of all files created in the directory to the group owner of the directory.
Which of the following commands would create a hard link, link to file?
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ln file link

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