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IT 240 - Midterm 2
Introduction to Linux I Midterm Exam Q/A
| Question | Answer |
|---|---|
| Which command is used in order to view the manual page for a topic? • help • doc • show • man | • man |
| The basic form of a command line is: • command [options…] [arguments…] • command [arguments…] options • command arguments options • command [options…] arguments… | • command [options…] [arguments…] |
| A command can be: (choose three) • A block • A function • A program built-in to the shell • An alias • A configuration file • A variable | • A function • A program built-in to the shell • An alias |
| Which of the following man page sections will provide an example of how a command is executed? • The DESCRIPTION section • The NAME section • The FILES section • The SYNOPSIS section | • The SYNOPSIS section |
| The command man 5 passwd will: • Display the first five lines of the man page for the passwd command. • Print the first five man pages that refer to the term passwd. • Display the man page of Section 5 for passwd. | • Display the man page of Section 5 for passwd. |
| Which character(s) cannot be placed in variable names? • Hyphen (“-“) character • Numeric characters • Underscore (“_”) character • Upper-case alpha characters • Lower-case alpha characters | • Hyphen (“-“) character |
| Shell variables are used to: • Reboot the system • Prevent users from logging in • Hide passwords • Hold critical system information | • Hold critical system information |
| Local variables are: • Only available to the shell they are created in • Passed into other shells and commands • Are not a valid type of variable • Not used by shells at all | • Only available to the shell they are created in |
| Environment variables cannot be declared by which command? • export • declare • set • typeset | • set |
| The /usr/local/bin directory contains: • Essential administrative commands • Nothing; it is not a valid directory • Commands that have been compiled from local sources | • Commands that have been compiled from local sources |
| The key press combination that will request a running process terminate: • CTRL+c • CTRL+d • CTRL+z • CTRL+p | • CTRL+c |
| A popular program for monitoring running processes in real-time is: • watcher • mon • ghost • top | • top |
| To send a signal to a set of processes with the same name, you can run: • killall • sigkill • allkill • grpkill | • killall |
| Which of the following commands will stop all processes owned by the user bob? (choose two) • kill -u bob • pkill -u bob • kill -l • killall -u bob | • pkill -u bob • killall -u bob |
| The range defined inside of square brackets is based on the: • ASCII text table • Invalid question as ranges are not permitted • ANSI text table • Standard text table | • ASCII text table |
| You can combine glob characters in a single pattern, for example: a??*[0-9]. True or False? • True • False | • True |
| The ls command can list the contents of only one directory at a time. True or False? • True • False | • False |
| To perform a “long listing” to show file details, use which of the following commands: • ls -L • ls -D • ll • ls -l | • ls -l |
| The mv command can be used to move more than one file at a time. True or False? • True • False | • True |
| Which option(s) for the rm command can be used to delete directories that contain files? (choose two) • -r • -R • -D • -A | • -r • -R |
| Which character at the beginning of a long listing indicates a regular file? • c • d • l • – | • – |
| To decompress the archive example.gz, use the following command: • gunzip -x example.gz • gunzip example.gz • gzip -x example.gz • gzip -u example.gz | • gunzip example.gz |
| By default, tar will attempt to extract an archive… • to the specified directory. • into the working directory. • into the user’s home directory. • into the archive’s parent directory. | • into the working directory. |
| Which of the following options puts the cpio command into copy-in mode? • -o • -u • -v • -i | • -i |
| The dd command can be used to create large files the can be used as swap files. True or False? • True • False | • True |
| Which of the following is not a valid argument for the dd command? • if • count • in • bs • of | • in |
| Which of the following are advantages of using the locate command? • It can search by file attribute types • It pages the results • Its results are always the most up to date • It is quicker than the find command | • It is quicker than the find command |
| Many commands that read text files will also read from this stream: • redirect • stdin • pipe • input | • stdin |
| If you want to overwrite a file by redirecting the output of a command, you can use: • & • } • > • | | • > |
| To redirect the errors that are output by a command, you can use: • 2@ • 2& • 2> • @ | • 2> |
| Which two symbols can effectively redirect stdin to a command? (choose two) • < • > • | • ! | • < • | |
| To send the normal and error output of a command to a single file, you can use: • 2> • > • 1> • &> | • &> |
| The head -n -1 readme.txt command will: • Display all but the last line of readme.txt • Number the lines of readme.txt • Show the first character of every line of readme.txt • Display the first line of readme.txt | • Display all but the last line of readme.txt |
| Why would you press CTRL+C when executing tail? • To capture the output into a file • To stop tail from following a file • To complete the processing of a file • To get tail to copy the text it is outputting | • To stop tail from following a file |
| Which command merges two files like related tables in a database? • sql • join • query • paste | • join |
| Which command will remove consecutive duplicate lines from a file? • unique • uniq • dup • dedup | • uniq |
| The _____ command provides many options for formatting a file for printing. • pr • format • header • print | • pr |
| Which 'regular expression' character matches zero or more of the previous character? • . • + • * • ? | • * |
| Which of the following regular expression characters is an extended regular expression character? • + • . • * • $ | • + |
| The regular expression a* is equivalent to: • a{0,1} • a{1,} • a{1} • a{0,} | • a{0,} |
| To use regular expression characters to match themselves, you cannot: • Use the fgrep command • Put the character in the square brackets • Use the slash in front of the character • Use the backslash in front of the character | • Use the slash in front of the character |
| What is NOT a purpose of using parentheses around parts of a regular expression? • Used to change the order that the pattern is evaluating • Used to refer back to what was matched • Used to group characters for repetition | • They can be used to change the order that the pattern is evaluating |
| To navigate to the end of the line in vi command mode, you can press: • ^ • * • $ • # | • $ |
| To search forward from your cursor in your vi document in command mode, you can type __ followed by the pattern to search for. • • | • / • ? | • / |
| If you are in vi command mode and want to begin inserting text at the end of the line, you can type: • I • o • A • O | • A |
| If you want to move a character to the right in vi command mode, you can press the right arrow key or: • j • k • h • l | • l |
| If you want to move up a line in vi command mode, you can press the up arrow key or: • l • k • h • j | • k |
| Which permission is necessary on a directory in order for a user to use the cd command to change that directory? • Execute • None • Write • Read | • Execute |
| The setuid permission on a file: • Causes the file to run under the user’s identity • Causes the file to run under the owner’s identity • Causes the file to never run as root • Causes the file to always run as root | • Causes the file to run under the owner’s identity |
| The command, chmod 1777 /data will: • Make the /data directory a setgid directory • Make the /data directory a sticky bit directory • Make the /data directory a setuid directory • Remove all special permissions | • Make the /data directory a sticky bit directory |
| The command, chmod 2777 /data will: • Remove all special permissions • Make the /data directory a setuid directory • Make the /data directory a sticky bit directory • Make the /data directory a setgid directory | • Make the /data directory a setgid directory |
| Which are valid link types in Linux? (choose two) • Soft links • Stable links • Hard links • Filesystem links | • Soft links • Hard links |
| Which is true about hard links? • They can only be created by the root user • They share inodes • They are created with the ln -s command • They can be made to directories | • They share inodes |
| Which value represents the inode number in the following output of the ls -li command: 87589 -rw-r–r–. 2 root root 83 Mar 4 22:45 myhosts • 87589 • 22:45 • 2 • 83 | • 87589 |
| The FHS sets which standard? • Which services should be installed • Which partitions should be created • Which directories should be used to hold specific files • Which filesystem types should be used | • Which directories should be used to hold specific files |
| The location of users’ default shells is stored in the ______ file. • /etc/group • /etc/gshadow • /etc/passwd • /etc/shadow | • /etc/passwd |
| Long command options are preceded by which two characters? • ** • || • — • && | • — |
| Which two characters do you use to tell the command that you are finished providing options and that the remaining data on the command line is arguments? • ** • — • || • && | • — |
| To see a list of commands that are available while viewing a man page, you can type the __ character. • h • g • c • w | • h |
| System Administration man pages are typically located in section ___. • 6 • 9 • 8 • 7 | • 8 |
| What option to the kill command will list the signals for the system? • -r • -9 • -l • -list | • -l |
| Which glob character matches “exactly one character”? • * • . • [ • ? | • ? |
| Which glob character matches “zero or more characters”? • . • ? • [ • * | • * |
| Which two characters match “a single character from a set of specified characters”? • [] • ?? • .. • ** | • [] |
| Which option to the find command will search by user owner? • -person • -user • -owner • -uowner | • -user |
| Which type of link can be made to directories, hard or soft? • soft • hard | • soft |
| Which type of link is easier to visually “see”, hard or soft? • hard • soft | • soft |
| Which type of link is indistinguishable by programs from regular files, hard or soft? • hard • soft | • hard |
| Which directory is used to store temporary files? • /etc • /tmp • /temp | • /tmp |
| Which directory is used for the home directory of the root user? • /home/root • / • /var • /root | • /root |
| To send the normal and error output of a command to a single file, you can use: | 2> |
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