11901930
Descrição
Quiz por Carlos Alberto Jara Alva, atualizado more than 1 year ago
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Criado por Carlos Alberto Jara Alva
quase 7 anos atrás
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Questão 1
Questão
You type mkdir one/two/three and receive an error message that reads, in part, No
such file or directory. What can you do to overcome this problem? (Select two.)
Responda
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Add the --parents parameter to the mkdir command.
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Issue three separate mkdir commands: mkdir one, then mkdir one/two, and then mkdir one/two/three.
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Type touch /bin/mkdir to be sure the mkdir program file exists.
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Type rmdir one to clear away the interfering base of the desired new directory tree.
-
Type mktree one/two/three instead of mkdir one/two/three.
Questão 2
Questão
Typing ls -ld wonderjaye reveals a symbolic file mode of drwxr-xr-x. Which of the
following are true? (Select two.)
Responda
-
wonderjaye is a symbolic link.
-
wonderjaye is an executable program.
-
wonderjaye is a directory.
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wonderjaye has its SUID bit set.
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wonderjaye may be read by all users of the system.
Questão 3
Questão
When should programs be configured SUID root?
Responda
-
At all times. This permission is required for executable programs.
-
Whenever a program should be able to access a device file.
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Only when they require root privileges to do their job.
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Never. This permission is a severe security risk
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Whenever the program file is owned by the root user.
Questão 4
Questão
You see the usrquota and grpquota options in the /etc/fstab entry for a filesystem.
What is the consequence of these entries?
Responda
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Quota support will be available if it’s compiled into the kernel; it will be automatically activated when you mount the filesystem.
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User quotas will be available, but the grpquota option is invalid and will be ignored.
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Quota support will be disabled on the filesystem in question.
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Nothing. These options are malformed and so will have no effect
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Quota support will be available if it’s compiled into your kernel, but you must activate it with the quotaon command.
Questão 5
Questão
Which of the following commands can be used to summarize the quota information about
all filesystems?
Responda
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repquota
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repquota -a
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quotacheck
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quotacheck –a
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edquota -a
Questão 6
Questão
Which of the following file-location commands is likely to take the most time to find a file
that may be located anywhere on the computer (assuming the operation succeeds)?
Responda
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The find command.
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The locate command.
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The whereis command.
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The type command.
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They’re all equal in speed.
Questão 7
Questão
What can the type command do that whereis can’t?
Responda
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Identify the command as being for x86 or x86-64 CPUs
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Locate commands based on their intended purpose, not just by name
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Identify a command as an alias, internal command, or external command
-
Assist in typing a command by finishing typing it for you
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Identify a command as being a binary or a script
Questão 8
Questão
What can you conclude from the following interaction?
$ which man
/usr/bin/man
Responda
-
The only file called man on the computer is in /usr/bin.
-
The /usr/bin/man program was installed by system package tools.
-
The /usr/bin/man program will be run by any user who types man.
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The first instance of the man program, in path search order, is in /usr/bin.
-
The user man owns the /usr/bin/man program file.
Questão 9
Questão
Which one of the following commands copies files with the .txt extension from /dir into /dir2, while preserving file attributes such as dates?
Responda
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mv --copy /dir1/*.txt /dir2
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mv /dir1/*.txt /dir2
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cp -k /dir1/*.txt /dir2
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cp -p /dir1/*.txt /dir2
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cp -p /dir2 < /dir/*.txt
Questão 10
Questão
Which one of the following file globs matches "Linux" and "linux", but not "linux.com" and not "TurboLinux"?
Responda
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[L/linux]
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?inux
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\L\linux
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[Ll]inux
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[Ll]inux?
Questão 11
Questão
Which one of the following outcomes results from the following command?
#chmod g+s /home/software
Responda
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The SUID bit will be set for /home/software
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The SGID bit will be set for /home/software, preventing access by those not a member of the software group.
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The SGID bit will be set for /home/software, in order to keep group membership of the directory consistent for all files created.
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The sticky bit will be set for /home/software
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The sticky bit will be applied to all files in /home/software.
Questão 12
Questão
Which one of the following commands versosely extracts files from a tar archive on a magnetic tape device?
Responda
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tar cvf /dev/st0
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tar cvf /dev/ttyS0
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tar xvf /dev/st0
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tar xvf /dev/ttyS0
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tar rvf /dev/st0
Questão 13
Questão
Which command can be used to quickly tell you if an executable command is in any directory defined in your $PATH environment variable?
Responda
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find
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locate
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which
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who
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what
Questão 14
Questão
Which directory, according to he Filesystem Hierarchy Standard, is designed to hold essential system binaries?
Responda
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/sbin
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/bin
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/usr/bin
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/opt/bin
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/usr/local/bin
Questão 15
Questão
According to the Filesystem Hierarchy Standard, what directory (or directories) must hold the system kernel? (Select two)
Responda
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/boot
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/
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/opt
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/sbin
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/kernel
Questão 16
Questão
What command(s) can be used to copy data to and from raw devices, bypassing the filesystem? (Select two)
Responda
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cp
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tar
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dd
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mv
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sed
Questão 17
Questão
A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?
Responda
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rmdir '~/\dir'
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rmdir "~/\dir"
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rmdir ~/'dir'
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rmdir ~/\dir
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rmdir ~/\\dir
Questão 18
Questão
Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?
Responda
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dirname
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which
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basename
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query
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whereis
Questão 19
Questão
In compliance with the FHS, in which of the directories are man pages found?
Responda
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/usr/share/man
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/opt/man
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/usr/doc/
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/var/pkg/man
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/var/man
Questão 20
Questão
Which of the following commands displays the contents of a gzip compressed tar archive?
Responda
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gzip archive.tgz | tar xvf -
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tar ztf archive.tgz
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gzip -d archive.tgz | tar tvf -
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tar cf archive.tgz
Questão 21
Questão
Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?
Responda
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cat < myapp | cat > file1.log
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myapp 0>&1 | cat > file1.log
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myapp | cat > file1.log
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myapp | tee file1.log
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tee myapp file1.log
Questão 22
Questão
Which of the following commands will change the quota for a specific user?
Responda
-
edquota
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repquota
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quota -e
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quota
Questão 23
Questão
Which of the following file permissions belong to a symbolic link?
Responda
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-rwxrwxrwx
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+rwxrwxrwx
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lrwxrwxrwx
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srwxrwxrwx
Questão 24
Questão
What is the output of the following command?
#echo "Hello World" | tr -d aieou
Responda
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Hello World
-
eoo
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Hll Wrld
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eoo Hll Wrld
Questão 25
Questão
In a nested directory structure, which find command line option would be used to restrict the command to searching down a particular number of subdirectories?
Responda
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-dirmax
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-maxdepth
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-maxlevels
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-n
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-s
Questão 26
Questão
Which of the following commands will NOT update the modify timestamp on the file /tmp/myfile.txt?
Responda
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file /tmp/myfile.txt
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echo "Hello" >/tmp/myfile.txt
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sed -ie "s/1/2/" /tmp/myfile.txt
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echo -n "Hello" >>/tmp/myfile.txt
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touch /tmp/myfile.txt
Questão 27
Questão
What does the ? symbol within regular expressions represent?
Responda
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Match the preceding qualifier one or more times
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Match the preceding qualifier zero or more times.
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Match the preceding qualifier zero or one times.
-
Match a literal ? character.
Questão 28
Questão
Which of the following commands prints all files and directories within the /tmp directory or its subdirectories
which are also owned by the user root? (Choose TWO correct answers.)
Responda
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find /tmp -uid root -print
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find -path /tmp -uid root
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find /tmp -user root -print
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find /tmp -user root
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find -path /tmp -user root print
Questão 29
Questão
Which of the following commands changes the ownership of file.txt to the user dan and the group staff?
Responda
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chown dan/staff file.txt
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chown dan:staff file.txt
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chown -u dan -g staff file.txt
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chown dan -g staff file.txt
Questão 30
Questão
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?
Responda
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chmod u=rwx,go=rx /bin/foo
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chmod o+rwx,a+rx /bin/foo
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chmod 577 /bin/foo
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chmod 775 /bin/foo
Questão 31
Questão
Which of the following commands can be used to display the inode number of a given file?
Responda
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inode
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ls
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ln
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cp
Questão 32
Questão
Which of the following commands are common Linux commands for file management? (Choose three
correct answers.)
Responda
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copy
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mv
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move
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cp
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mkdir
Questão 33
Questão
Which of the following commands can be used to create a new file that is 100kB in size?
Responda
-
dd
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file
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mkfile
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touch
Questão 34
Questão
In compliance with the FHS, in which of the following directories are documentation files found?
Responda
-
/usr/share/documentation
-
/usr/local/share/documentation
-
/var/share/doc
-
/usr/share/doc
-
/etc/share/doc
Questão 35
Questão
Which chown command will change the ownership to dave and the group to staff on a file named
data.txt?
Responda
-
chown dave/staff data.txt
-
chown –u dave –g staff data.txt
-
chown --user dave --group staff data.txt
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chown dave:staff data.txt
Questão 36
Questão
Which of the following is the GRUB 2 boot loader configuration file?
Responda
-
/dev/grub
-
The MBR
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/boot/grub/grub.conf
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/boot/grub/grub.cfg
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/boot/grub/menu.lst
Questão 37
Questão
What program do you use to start or stop services when using the systemd initialization
process?
Responda
-
journalctl
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systemctl
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init
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service
-
systemd
Questão 38
Questão
What is an advantage of vi over graphical text editors?
Responda
-
vi is X based, so it is easier to use than other graphical text editors.
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vi encodes text in EBCDIC, which is more flexible than Emacs’s ASCII.
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vi’s mode-based operations permit it to handle non-English languages.
-
vi includes a built-in web browser and email client; Emacs doesn’t.
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vi is smaller, so it can fit on compact emergency USB flash drive systems and embedded devices.
Questão 39
Questão
How do you exit vi’s insert mode to type command-mode commands?
Responda
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Press the ~ key.
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Press the Esc key.
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Press Ctrl+X followed by Ctrl+C.
-
Press the F10 key.
-
Press the Shift+Insert key combination.
Questão 40
Questão
What line in /etc/inittab would indicate that your default runlevel is 5?
Responda
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ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
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id:5:initdefault:
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si:5:sysinit:/etc/init.d/rcS
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l5:5:wait:/etc/init.d/rc 5
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1:2345:respawn:/sbin/getty 38400 tty1
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