Test 3 Flashcards
To prevent a file from being cleared by the BASH shell and append output to the existing output, you can specify three > metacharacters alongside the file descriptor.
1) True
2) False
2) False
You are limited to using one pipe | metacharacter on the command line to pipe information from one command to another command.
1) True
2) False
1) True
You can use the sed command to remove unwanted lines of text.
1) True
2) False
1) True
Any command that can be executed on the command line can also be placed inside any environment file.
1) True
2) False
1) True
Given the syntax command && command, the command on the left of the && construct is executed only if the command on the right of the && construct completed successfully.
1) True
2) False
2) False
The BASH shell assumes stdout in the absence of a numeric file descriptor.
1) True
2) False
1) True
Users can create their own custom variables, called shell variables.
1) True
2) False
2) False
The ENV environment variable represents the location of the BASH run-time configuration file.
1) True
2) False
1) True
Aliases are shortcuts to commands stored in special variables that can be created and viewed using the alias command.
1) True
2) False
1) True
In a decision construct, you can have an unlimited number of if then statements.
1) True
2) False
2) False
The file descriptor stdin is represented by the number ____.
1) 0
2) 1
3) 2
4) 3
1) 0
The file descriptor stderr is represented by the number ____.
1) 0
2) 1
3) 2
4) 3
3) 2
You can use the BASH shell to redirect standard output and standard error from the terminal screen to a file on the filesystem using the ____ shell metacharacter followed by the absolute or relative pathname of the file.
1) #
2)
4) |
3) >
You can redirect a file to the standard input of a command using the ____ metacharacter.
1) >
2) #
3) |
4) <
4) <
The ____ command can be used to replace characters in a file sent via Standard Input.
1) tr
2) rt
3) ts
4) st
1) tr
You can send the standard output of one command to another command as standard input using the ____ shell metacharacter.
1) <
2) |
3) >
4) #
2) |
The ____ command counts the number of lines, words, and characters in a file.
1) pr
2) nl
3) tr
4) wc
4) wc
The ____ command can be used to extract, manipulate, and format text using pattern-action statements.
1) sed
2) grep
3) awk
4) nl
3) awk
Most configuration files on Linux systems are delimited using ____ characters.
1) tab
2) colon
3) space
4) semicolon
2) colon
To see a list of the environment variables and their current values on a system, you can use the ____ command.
1) env
2) get
3) set
4) setenv
3) set
The ____ command could be used to view the contents of the environment variable that represents the BASH shell prompt.
1) ls $PWD
2) echo #PWD
3) echo $PS1
4) ls #PS1
3) echo $PS1
To see a list of all exported environment and user-defined variables in the shell, you can use the ____ command.
1) env
2) set
3) setenv
4) getenv
1) env
The ____ environment file is always executed immediately after login for all users on the system, and sets most environment variables, such as HOME and PATH.
1) ~/.bash_profile
2) ~/.bash_login
3) /etc/profile
4) ~/.profile
3) /etc/profile
If you have ____ permission to a shell script, you can execute the shell script like any other executable program on the system.
1) read
2) write and read
3) execute
4) read and execute
4) read and execute
The ____ escape sequence represents a form feed.
1) \n
2) \f
3) /f
4) /n
2) \f
The test statement ____ would be used to determine if A is numerically greater than B.
1) [ A –g B ]
2) [ A –ge B ]
3) [ A –gt B ]
4) [ A +eq B ]
3) [ A –gt B ]
Are both standard output and standard error displayed on the terminal screen by default?
1) Yes
2) No
1) Yes
When redirecting both standard output and standard error to a file, does using the same filename for both result in a loss of data?
1) Yes
2) No
1) Yes
Can the redirection shell metacharacter be used to redirect between a command and another command?
1) Yes
2) No
2) No
When performing a pipe, do you need to have spaces around the | metacharacter?
1) Yes
2) No
2) No
Can you combine redirection and piping together?
1) Yes
2) No
1) Yes
If you are using a Linux boot loader to dual boot another operating system in addition to Linux, it is easiest if Linux is installed after the other operating system has been installed.
1) True
2) False
1) True
The /etc/rc.d/rc 5 script only executes files that start with S in the /etc/rc.d/rc5.d/ directory.
1) True
2) False
2) False
Most daemon scripts accept the arguments start, stop, and restart.
1) True
2) False
1) True
Using one boot loader to boot one of several operating systems is known as multi-booting.
1) True
2) False
2) False
LILO is the most common boot loader used on modern Linux systems and the only boot loader supported by Fedora 13. 1) True
2) False
2) False
To see the current runlevel of the system and the previous runlevel (if runlevels have been changed since system startup), you can use the runlevel command.
1) True
2) False
1) True
Administrators most commonly use a(n) graphical user interface.
1) True
2) False
2) False
The core component of a Linux GUI is X Windows.
1) True
2) False
1) True
The Linux kernel is stored in the ____ directory.
1) /
2) /boot
3) /root
4) /krnl
2) /boot
____ of the GRUB boot loader typically resides on the Master Boot Record.
1) Stage1
2) Stage1.5
3) Stage2
4) Stage2.5
1) Stage1
In the /etc/lilo.conf file, the ____ keyword specifies the absolute pathname to the Linux kernel.
1) image=
2) default=
3) install=
4) root=
1) image=
In Linux, runlevel ____ is also known as multiuser mode.
1) 1
2) 2
3) 3
4) 4
2) 2
A Linux system in runlevel ____ is a system that has no daemons active in memory and is ready to be powered off. 1) 0
2) 1
3) 6
4) 7
1) 0
After the entries in /etc/inittab have been executed, the ____ file is executed to perform tasks that must occur after system startup.
1) /etc/rc/rc.local
2) /etc/rc.d/local
3) /etc/rc.d/rc.local
4) /etc/rc/local
3) /etc/rc.d/rc.local
You can use the ____ command to start, stop, or restart any daemons listed within the /etc/rc.d/init.d directory.
1) daemon
2) manip-daemon
3) service
4) daemon-service
3) service
____ is a freely available version of X Windows used in many Linux distributions.
1) X.org
2) XFree
3) FreeX86
4) XFree86
4) XFree86
The two most common desktop environments that are used on Linux are ____ and ____.
1) KDE; kwin
2) KDE; Xfce
3) Xfce; GNOME
4) KDE; GNOME
4) KDE; GNOME
The ____ window manager is used for the GNOME desktop in Red Hat Fedora Core 2.
1) kwin
2) twm
3) metacity
4) sawfish
3) metacity
If your system uses the X.org implementation of X Windows, the mouse, keyboard, monitor, and video adapter card information is stored in the ____ file in text format.
1) /etc/X11/XF86Config
2) /etc/X11/xorg.conf
3) /etc/X11/xwin.conf
4) /etc/X11/xorg
2) /etc/X11/xorg.conf
After configuring X Windows, you can fine-tune the vsync and hsync of the video card using the ____ utility within the desktop environment.
1) xvidtune
2) xvideotune
3) xtune
4) vidtune
1) xvidtune
Can there be more than one active partition on a hard disk?
1) Yes
2) No
2) No
Can LILO boot a Windows kernel directly? 1) Yes
2) No
2) No
Can you use a Windows boot loader to load the Linux operating system?
1) Yes
2) No
1) Yes
Do X clients need to run on the same computer as X Windows?
1) Yes
2) No
2) No
If you use runlevel 3, can you start the GNOME Display Manager manually?
1) Yes
2) No
1) Yes
Each process can start an unlimited number of other processes.
1) True
2) False
1) True
The ps command is the only command that can view process information.
1) True
2) False
2) False
The killall command uses the PID to kill a process.
1) True
2) False
2) False
After a process has been started, you can change its priority by using the renice command.
1) True
2) False
1) True
If the /etc/at.allow and /etc/at.deny files do not exist, only the root user is allowed to schedule tasks using the at daemon.
1) True
2) False
1) True
The init daemon has a PID of 0.
1) True
2) False
2) False
While a process is waiting for its parent process to release the PID, the process is said to be in a(n) zombie state.
1) True
2) False
1) True
A value of 0 for a process priority indicates low priority.
1) True
2) False
2) False
The SIGINT kill signal is the default kill signal used by the kill command.
1) True
2) False
2) False
Most commands such as ls, find, and grep are binary programs that exist on the filesystem until executed.
1) True
2) False
1) True
A system process that is not associated with a terminal is called a(n) ____ process.
1) daemon
2) user
3) parent
4) startup
1) daemon
To display an entire list of processes across all terminals and including daemons, you can add the ____ option to any ps command.
1) -f
2) -l
3) -a
4) -e
4) -e
In the output of the ps -l command, the ____ column is the most valuable to systems administrators because it indicates what the process is currently doing.
1) process state
2) process flag
3) process priority
4) PID
1) process state
The ____ option to the ps command displays all processes that do not run on terminals.
1) -f
2) x
3) a
4) -l
2) x
There are ____ different kill signals that the kill command can send to a certain process.
1) 16
2) 32
3) 64
4) 128
3) 64
The ____ kill signal stops a process and then restarts it with the same PID.
1) SIGINT
2) SIGQUIT
3) SIGHUP
4) SIGTERM
3) SIGHUP
The ____ kill signal terminates a process by taking the process information in memory and saving it to a file called core on the hard disk in the current working directory.
1) SIGINT
2) SIGQUIT
3) SIGKILL
4) SIGTERM
2) SIGQUIT
You can execute ____ main types of Linux commands.
1) two
2) three
3) four
4) five
2) three
When you append a(n) ____ to a command, the command is run in a background process.
1) &
2) $
3) #
4) %
1) &
When killing a background job with the kill command, you must prefix the background job IDs by a(n) ____.
1) &
2) #
3) $
4) %
4) %
After a background process has been started, it can be moved to the foreground by using the ____ command.
1) b2f
2) fgd
3) fg
4) fgnd
3) fg
When there are multiple background processes executing in the shell, the jobs command indicates the most recent one with a(n) ____ symbol.
1) *
2) +
3) -
4) /
2) +
Processes are started with a nice value of ____ by default.
1) -20
2) 0
3) 1
4) 19
2) 0
To display a list of at Job IDs, you can specify the ____ option to the at command.
1) -l
2) -u
3) -a
4) -d
1) -l
The ____ field in a cron table contains the absolute pathname to the command to be executed.
1) first
2) second
3) fifth
4) sixth
4) sixth
To create or edit a user cron table, you can use the ____ option to the crontab command.
1) -u
2) -c
3) -f
4) -e
4) -e
Can a process have multiple parent processes?
1) Yes
2) No
2) No
Does a negative nice value give a process a greater chance of a lower priority?
1) Yes
2) No
2) No
Can the top command be used to change the priority of processes?
1) Yes
2) No
1) Yes
Can the SIGKILL kill signal be trapped by a process?
1) Yes
2) No
2) No
If you send a kill signal to a process that has children, are the child processes terminated?
1) Yes
2) No
1) Yes
If you want to enable a printer, you must specify the printer name to the cupsenable command.
1) True
2) False
1) True
You can restrict who can print to certain printers by using the ____ command.
1) lpadmin
2) lpa
3) lpr
4) admin
1)lpadmin
Log files are typically stored in the ____ directory.
1) /dev/log
2) /var/log
3) /boot/log
4) /log
2) /var/log
The ____ log file contains information and error messages regarding network access generated by daemons such as sshd and xinetd.
1) wtmp
2) messages
3) dmesg
4) secure
4) secure
To convert a system so that it uses an /etc/shadow file to store the encrypted password after installation, you can run the ____ command.
1) passwdconv
2) pwconv
3) passwd
4) pwdcv
2) pwconv
You can create user accounts on the Linux system by using the ____ command.
1) uadd
2) usercreate
3) adduser
4) useradd
4) useradd
The skeleton directory on most Linux systems is ____.
1) /etc/skel
2) /var/skel
3) /etc/skeleton
4) /var/skeleton
1) /etc/skel
To lock an account, you can use the usermod command with the ____ option.
1) -U
2) -u
3) -l
4) -L
4) -L
You can specify the ____ option to the userdel command to remove the home directory for the user and all of its contents.
1) -r
2) -d
3) -R
4) -x
1) -r
To change the primary group temporarily to another group that is listed in the output of the groups and id commands, you can use the ____ command.
1) newgroup
2) groupmod
3) newgrp
4) groupadd
3) newgrp
Can a user account be used to log in to the system before its password is set?
1) Yes
2) No
2) No
Can the usermod command be used to modify the password expiration information stored in /etc/shadow?
1) Yes
2) No
2) No
The compress utility preserves the original ownership, modification, and access time for each file that it compresses.
1) True
2) False
1) True
When using the gzip utility, the -1 option is also known as best compression and results in a higher compression ratio.
1) True
2) False
2) False
When creating a system backup, temporary files in the /tmp and /var/tmp directories should be included.
1) True
2) False
2) False
The tar utility cannot back up device files or files with filenames longer than 255 characters.
1) True
2) False
1) True
It is good form to read the Makefile after you run the configure script.
1) True
2) False
1) True
If a compression utility compresses a file to 52% of its original size, it has a compression ratio of 52%.
1) True
2) False
2) False
To decompress files that have been compressed with the compress utility, you can use the decompress command followed by the names of the files to be decompressed.
1) True
2) False
2) False
Traditionally, CDs/DVDs were used to back up data.
1) True
2) False
2) False
Because its primary use is to back up files in case of system failure, cpio uses absolute pathnames by default when archiving.
1) True
2) False
1) True
The dump/restore utility can only work with files on ext2 and ext3 filesystems.
1) True
2) False
1) True
The compression algorithm used by the compress utility has an average compression ratio of ____%.
1) 30-40
2) 40–50
3) 50-60
4) 60-70
2) 40–50
When using the compress utility, each file is renamed with a(n) ____ filename extension to indicate that it is compressed.
1) .c
2) .cmp
3) .cpz
4) .Z
4) .Z
The ____ command can be used to display the contents of a compressed file.
1) acat
2) zcat
3) cat
4) ccat
2) zcat
The average compression ratio for gzip is ____%.
1) 40-50
2) 50-60
3) 60–70
4) 70-80
3) 60–70
When used with the compress command, the ____ option can be used to compress symbolic links.
1) -f
2) -c
3) -v
4) -r
1) -f
When used with the uncompress command, the ____ option displays the contents of the compressed file to Standard Output.
1) -c
2) -v
3) -f
4) -r
1) -c
If no level of compression is specified, the gzip command assumes the number ____.
1) 4
2) 5
3) 6
4) 7
3) 6
The ____ option, when used with the gzip command, causes the compression ratio for files that have been compressed to be listed.
1) -c
2) -f
3) -r
4) -l
4) -l
The filename extension given to files compressed with bzip2 is ____.
1) .bz
2) .bz2
3) .gz
4) .Z
2) .bz2
When used with the tar utility, the ____ option causes filenames to be stored in an archive using absolute pathnames.
1) -a
2) -b
3) -p
4) -n
3) -p
The ____ option can be used with the tar command to extract a specified archive.
1) -s
2) -e
3) -x
4) -a
3) -x
When using the cpio utility, the ____ option causes a new archive to be created.
1) -n
2) -c
3) -o
4) -a
3) -o
You can perform up to ____ different incremental backups using the dump/restore utility.
1) seven
2) eight
3) nine
4) ten
3) nine
Most Linux distributions today use ____ as their package manager.
1) RPM
2) PRM
3) MPR
4) RMP
1) RPM
The ____ command looks for a Makefile and uses the information within to compile the source code into binary programs using the appropriate compiler program for the local hardware architecture.
1) configure
2) install
3) make install
4) make
4) make
To remove a package from the system, you can use the ____ option to the rpm command.
1) -d
2) -e
3) -r
4) -x
2) -e
Can the contents of a compressed file be viewed page-by-page?
1) Yes
2) No
1) Yes
Can symbolic links be compressed by the gzip utility?
1) Yes
2) No
1) Yes
Can the bzip2 utility be used to compress a directory full of files?
1) Yes
2) No
2) No
Does the tar utility compress files inside an archive?
1) Yes
2) No
2) No
Can you write files to CD and DVD media using the tar, cpio, or dump utilities?
1) Yes
2) No
2) No
