The less command offers less functionality than the more command.
False
[The less command offers greater functionality compared to the more command, including the ability to scroll contents using cursor keys.]
A user typed the command pwd and saw the output: /home/jim/sales/pending. How could that user navigate to the /home/jim directory?
B. cd ../..
[Since the /home/jim directory is two parent directories closer to the root directory compared to /home/jim/sales/pending, you can specify a relative path of two parent directories (../..) as an argument to the cd command.]
Linux has only one root directory per directory tree.
True
[UNIX and Linux systems have a single root directory, regardless of the number of storage devices within the system.]
If a user's current directory is /home/mary/project1, which command could they use to move to the etc directory directly under the root?
C. cd /etc
[The /etc path refers to the etc directory directly under the root. The relative path of .. would switch to /home/mary, while the relative path of etc would switch to /home/mary/project1/etc.]
A user types the command head /poems/mary. What will be displayed on the terminal screen?
A. the first 10 lines of the file mary
[The head command displays the first 10 lines of a text file by default.]
After typing the ls –a command, you notice a file whose filename begins with a period (.). What does this mean?
C. It is a hidden file.
[Hidden files have a filename that begin with a period character.]
The vi editor can function in which two of the following modes? (Choose both that apply.)
C. command
d. insert
[The two modes available within the vi editor are command mode and insert mode.]
How can a user switch from insert mode to command mode when using the vi editor?
C. Press the Esc key.
[You can press the Escape (Esc) key to switch from insert mode to command mode within the vi editor.]
Using a regular expression, how can you indicate a character that is not an a or b or c or d?
C. [^abcd]
[The square bracket regular expression metacharacters indicate a single character specified within, and the ^ regular expression metacharacter used within square brackets reverses the pattern matching.]
A special device file is used to _____.
C. represent hardware devices
[Device files are special files that represent hardware devices on the system, such as hard disk drives.]
A directory is a type of file.a. Trueb. False
True
[Directories are special files that serve to group other files.]
What will typing q! at the : prompt in command mode do when using the vi editor?
A. quit without saving any changes
[The q! sequence instructs the vi editor to quit and discard any changes made.]
If "resume" is the name of a file in the home directory off the root of the filesystem and your present working directory is home, what is the relative name for the file named resume?
C. resume
[Since your working directory is /home, you can refer to the file called resume within the same directory by its name alone.]
The tac command _____.
A. displays the contents of a file in reverse order, last line first and first line last
[The tac command performs the reverse of the cat command; it displays a file in reverse line order.]
Which of the following is an absolute pathname? (Choose all that apply.)
D. C:\myfolder\resume
c. /home/resume
[On a Windows system, absolute pathnames start from the root directory of a drive letter (e.g., C:\). On a Linux system, absolute pathnames start from the single root directory on the system (/).]
What will the following wildcard expression return: file[a-c]?
C. filea, fileb, filec
[The square bracket metacharacters are used to refer to a single character, matching the contents within.]
After typing the ls –F command, you notice a filename that ends with an * (asterisk) character. What does this mean?
D. It is an executable file.
[The ls -F command appends an asterisk to executable files.]
Which command searches for and displays any text contents of a binary file?
A. strings
[The strings command displays the text contents of any file type.]
Which command would a user type on the command line to find out the current directory in the directory tree?
D. pwd
[The pwd command displays the working directory of the user in the directory tree.]
How can you specify a text pattern that must be at the beginning of a line of text using a regular expression?
C. Precede the string with a ^.
[The ^ regular expression specifies that the pattern to match must appear at the beginning of a line.]