Este Quiz é cronometrado.
Você tem 50 minutos para completar as 40 questões deste quiz..
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.)
Add the --parents parameter to the mkdir command.
Issue three separate mkdir commands: mkdir one, then mkdir one/two, and then mkdir one/two/three.
Type touch /bin/mkdir to be sure the mkdir program file exists.
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.
Typing ls -ld wonderjaye reveals a symbolic file mode of drwxr-xr-x. Which of the following are true? (Select two.)
wonderjaye is a symbolic link.
wonderjaye is an executable program.
wonderjaye is a directory.
wonderjaye has its SUID bit set.
wonderjaye may be read by all users of the system.
When should programs be configured SUID root?
At all times. This permission is required for executable programs.
Whenever a program should be able to access a device file.
Only when they require root privileges to do their job.
Never. This permission is a severe security risk
Whenever the program file is owned by the root user.
You see the usrquota and grpquota options in the /etc/fstab entry for a filesystem. What is the consequence of these entries?
Quota support will be available if it’s compiled into the kernel; it will be automatically activated when you mount the filesystem.
User quotas will be available, but the grpquota option is invalid and will be ignored.
Quota support will be disabled on the filesystem in question.
Nothing. These options are malformed and so will have no effect
Quota support will be available if it’s compiled into your kernel, but you must activate it with the quotaon command.
Which of the following commands can be used to summarize the quota information about all filesystems?
repquota
repquota -a
quotacheck
quotacheck –a
edquota -a
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)?
The find command.
The locate command.
The whereis command.
The type command.
They’re all equal in speed.
What can the type command do that whereis can’t?
Identify the command as being for x86 or x86-64 CPUs
Locate commands based on their intended purpose, not just by name
Identify a command as an alias, internal command, or external command
Assist in typing a command by finishing typing it for you
Identify a command as being a binary or a script
What can you conclude from the following interaction? $ which man /usr/bin/man
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.
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.
Which one of the following commands copies files with the .txt extension from /dir into /dir2, while preserving file attributes such as dates?
mv --copy /dir1/*.txt /dir2
mv /dir1/*.txt /dir2
cp -k /dir1/*.txt /dir2
cp -p /dir1/*.txt /dir2
cp -p /dir2 < /dir/*.txt
Which one of the following file globs matches "Linux" and "linux", but not "linux.com" and not "TurboLinux"?
[L/linux]
?inux
\L\linux
[Ll]inux
[Ll]inux?
Which one of the following outcomes results from the following command? #chmod g+s /home/software
The SUID bit will be set for /home/software
The SGID bit will be set for /home/software, preventing access by those not a member of the software group.
The SGID bit will be set for /home/software, in order to keep group membership of the directory consistent for all files created.
The sticky bit will be set for /home/software
The sticky bit will be applied to all files in /home/software.
Which one of the following commands versosely extracts files from a tar archive on a magnetic tape device?
tar cvf /dev/st0
tar cvf /dev/ttyS0
tar xvf /dev/st0
tar xvf /dev/ttyS0
tar rvf /dev/st0
Which command can be used to quickly tell you if an executable command is in any directory defined in your $PATH environment variable?
find
locate
which
who
what
Which directory, according to he Filesystem Hierarchy Standard, is designed to hold essential system binaries?
/sbin
/bin
/usr/bin
/opt/bin
/usr/local/bin
According to the Filesystem Hierarchy Standard, what directory (or directories) must hold the system kernel? (Select two)
/boot
/
/opt
/kernel
What command(s) can be used to copy data to and from raw devices, bypassing the filesystem? (Select two)
cp
tar
dd
mv
sed
A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?
rmdir '~/\dir'
rmdir "~/\dir"
rmdir ~/'dir'
rmdir ~/\dir
rmdir ~/\\dir
Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?
dirname
basename
query
whereis
In compliance with the FHS, in which of the directories are man pages found?
/usr/share/man
/opt/man
/usr/doc/
/var/pkg/man
/var/man
Which of the following commands displays the contents of a gzip compressed tar archive?
gzip archive.tgz | tar xvf -
tar ztf archive.tgz
gzip -d archive.tgz | tar tvf -
tar cf archive.tgz
Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?
cat < myapp | cat > file1.log
myapp 0>&1 | cat > file1.log
myapp | cat > file1.log
myapp | tee file1.log
tee myapp file1.log
Which of the following commands will change the quota for a specific user?
edquota
quota -e
quota
Which of the following file permissions belong to a symbolic link?
-rwxrwxrwx
+rwxrwxrwx
lrwxrwxrwx
srwxrwxrwx
What is the output of the following command? #echo "Hello World" | tr -d aieou
Hello World
eoo
Hll Wrld
eoo Hll Wrld
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?
-dirmax
-maxdepth
-maxlevels
-n
-s
Which of the following commands will NOT update the modify timestamp on the file /tmp/myfile.txt?
file /tmp/myfile.txt
echo "Hello" >/tmp/myfile.txt
sed -ie "s/1/2/" /tmp/myfile.txt
echo -n "Hello" >>/tmp/myfile.txt
touch /tmp/myfile.txt
What does the ? symbol within regular expressions represent?
Match the preceding qualifier one or more times
Match the preceding qualifier zero or more times.
Match the preceding qualifier zero or one times.
Match a literal ? character.
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.)
find /tmp -uid root -print
find -path /tmp -uid root
find /tmp -user root -print
find /tmp -user root
find -path /tmp -user root print
Which of the following commands changes the ownership of file.txt to the user dan and the group staff?
chown dan/staff file.txt
chown dan:staff file.txt
chown -u dan -g staff file.txt
chown dan -g staff file.txt
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?
chmod u=rwx,go=rx /bin/foo
chmod o+rwx,a+rx /bin/foo
chmod 577 /bin/foo
chmod 775 /bin/foo
Which of the following commands can be used to display the inode number of a given file?
inode
ls
ln
Which of the following commands are common Linux commands for file management? (Choose three correct answers.)
copy
move
mkdir
Which of the following commands can be used to create a new file that is 100kB in size?
file
mkfile
touch
In compliance with the FHS, in which of the following directories are documentation files found?
/usr/share/documentation
/usr/local/share/documentation
/var/share/doc
/usr/share/doc
/etc/share/doc
Which chown command will change the ownership to dave and the group to staff on a file named data.txt?
chown dave/staff data.txt
chown –u dave –g staff data.txt
chown --user dave --group staff data.txt
chown dave:staff data.txt
Which of the following is the GRUB 2 boot loader configuration file?
/dev/grub
The MBR
/boot/grub/grub.conf
/boot/grub/grub.cfg
/boot/grub/menu.lst
What program do you use to start or stop services when using the systemd initialization process?
journalctl
systemctl
init
service
systemd
What is an advantage of vi over graphical text editors?
vi is X based, so it is easier to use than other graphical text editors.
vi encodes text in EBCDIC, which is more flexible than Emacs’s ASCII.
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.
vi is smaller, so it can fit on compact emergency USB flash drive systems and embedded devices.
How do you exit vi’s insert mode to type command-mode commands?
Press the ~ key.
Press the Esc key.
Press Ctrl+X followed by Ctrl+C.
Press the F10 key.
Press the Shift+Insert key combination.
What line in /etc/inittab would indicate that your default runlevel is 5?
ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
id:5:initdefault:
si:5:sysinit:/etc/init.d/rcS
l5:5:wait:/etc/init.d/rc 5
1:2345:respawn:/sbin/getty 38400 tty1
