Das ist ein zeitlich begrenztes Quiz.
Du hast 30 Minuten um die 60 Fragen in diesem Quiz zu beantworten.
Which type of file system is created by mkfs when it is executed with the block device name only and without any additional parameters?
XFS
VFAT
ext2
ext3
ext4
Which umask value ensures that new directories can be read, written and listed by their owning user, read and listed by their owning group and are not accessible at all for everyone else?
0750
0027
0036
7640
0029
Which of the following commands changes the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting?
tune2fs -d 200 /dev/sda1
tune2fs -i 200 /dev/sda1
tune2fs -c 200 /dev/sda1
tune2fs -n 200 /dev/sda1
tune2fs --days 200 /dev/sda1
Which is the default percentage of reserved space for the root user on new ext4 filesystems?
10%
3%
15%
0%
5%
5.- Which of the following is true when a file system, which is neither listed in /etc/fstab nor known to system, is mounted manually?
Systemd ignores any manual mounts which are not done using the systemctl mount command
The command systemctl mountsync can be used to create a mount unit based on the existing mount
systemd automatically generates a mount unit and monitors the mount point without changing it
Unless a systemd mount unit is created, systemd unmounts the file system after a short period of time
systemctl unmount must be used to remove the mount because system opens a file descriptor on the mount point
6.- Which program updates the database that is used by the locate command? (Specify ONLY the command without any path or parameters).
updatedb
upgrade
7.- What does the command mount --bind do?
It makes the contents of one directory available in another directory
It mounts all available filesystems to the current directory
It mounts all user mountable filesystems to the user's home directory
It mounts all file systems listed in /etc/fstab which have the option userbind set
It permanently mounts a regular file to a directory
8.- Consider the following output from the command ls -i:
How would a new file named c.txt be created with the same inode number as a.txt (Inode 525385)?
ln -h a.txt c.txt
ln c.txt a.txt
ln a.txt c.txt
In -f c.txt a.txt
ln -i 525385 c.txt
Consider the following directory: drwxrwxr-x 2 root sales 4096 Jan 1 15:21 sales Which command ensures new files created within the directory sales are owned by the group sales? (Choose two.)
chmod g+s sales
setpol -R newgroup=sales sales
chgrp -p sales sales
chown --persistent *.sales sales
chmod 2775 sales
10.- In order to display all currently mounted filesystems, which of the following commands could be used? (Choose two.)
cat /proc/self/mounts
free
lsmounts
mount
cat /proc/filesystems
11.- Which command displays the current disk space usage for all mounted file systems? (Specify ONLY the command without any path or parameters.)
df
ht
12.- Which chown command changes 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
chown dave:staff data.txt
13.- When considering the use of hard links, what are valid reasons not to use hard links?
Hard links are not available on all Linux systems because traditional filesystems, such as ext4, do not support them
Each hard link has individual ownership, permissions and ACLs which can lead to unintended disclosure of file content
Hard links are specific to one filesystem and cannot point to files on another filesystem
If users other than root should be able to create hard links, suln has to be installed and configured
When a hard linked file is changed, a copy of the file is created and consumes additional space
14.- In compliance with the FHS, in which of the directories are man pages found?
/opt/man/
/usr/doc/
/usr/share/man/
/var/pkg/man
/var/man/
15.- Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)
cmdline
repeat
16.- What is the process ID number of the init process on a System V init based system?
-1
0
1
It is different with each reboot
It is set to the current run level
17.- Which daemon handles power management events on a Linux system?
acpid
batteryd
pwrmgntd
psd
inetd
18.- Which of the following statements are true about the boot sequence of a PC using a BIOS? (Choose two.
Some parts of the boot process can be configured from the BIOS
Linux does not require the assistance of the BIOS to boot a computer
The BIOS boot process starts only if secondary storage, such as the hard disk, is functional
The BIOS initiates the boot process after turning the computer on
The BIOS is started by loading hardware drivers from secondary storage, such as the hard disk
19.- What is true regarding UEFI firmware? (Choose two.)
It can read and interpret partition tables
It can use and read certain file systems
It stores its entire configuration on the /boot/ partition
It is stored in a special area within the GPT metadata
It is loaded from a fixed boot disk position
20.- A faulty kernel module is causing issues with a network interface card. Which of the following actions ensures that this module is not loaded automatically when the system boots?
Using lsmod --remove --autoclean without specifying the name of a specific module
Using modinfo -k followed by the name of the offending module
Using modprobe -r followed by the name of the offending module
Adding a blacklist line including the name of the offending module to the file /etc/modprobe.d/blacklist.conf
Deleting the kernel module's directory from the file system and recompiling the kernel, including its modules
21.- When is the content of the kernel ring buffer reset? (Choose two.)
When the ring buffer is explicitly reset using the command dmesg --clear
When the ring buffer is read using dmesg without any additional parameters
When a configurable amount of time, 15 minutes by default, has passed
When the kernel loads a previously unloaded kernel module
When the system is shut down or rebooted
What is the first program the Linux kernel starts at boot time when using System V init?
/lib/init.so
/proc/sys/kernel/init
/etc/rc.d/rcinit
/sbin/init
/boot/init
23.- A Debian package creates several files during its installation. Which of the following commands searches for packages owning the file /etc/debian_version?
apt-get search /etc/debian_version
apt -r /etc/debian_version
find /etc/debian_version -dpkg
dpkg -S /etc/debian_version
apt-file /etc/debian_version
24.- What is contained on the EFI System Partition?
The Linux root file system
The first stage boot loader
The default swap space file
The Linux default shell binaries
The user home directories
25.- Which of the following directories on a 64 bit Linux system typically contain shared libraries? (Choose two.)
~/.lib64/
/usr/lib64/
/var/lib64/
/lib64/
/opt/lib64/
26.- Which of the following files exist in a standard GRUB 2 installation? (Choose two.)
/boot/grub/stages/stage0
/boot/grub/i386-pc/lvm.mod
/boot/grub/fstab
/boot/grub/grub.cfg
/boot/grub/linux/vmlinuz
27.- Which of the following commands installs all packages with a name ending with the string foo?
zypper get '*foo'
zypper update 'foo?'
zypper force 'foo*'
zypper install '*foo'
zypper add '.*foo'
Which of the following properties of a Linux system should be changed when a virtual machine is cloned? (Choose two.)
The partitioning scheme
The file system
The D-Bus Machine ID
The permissions of /root/
The SSH host keys
29.- Which of the following commands installs GRUB 2 into the master boot record on the third hard disk?
grub2 install /dev/sdc
grub-mkrescue /dev/sdc
grub-mbrinstall /dev/sdc
grub-setup /dev/sdc
grub-install /dev/sdc
30.- Which of the following partition types is used for Linux swap spaces when partitioning hard disk drives?
7
82
83
8e
fd
31 Which command shows kernel ring buffer messages produced during boot and runtime?
journalctl -b
dmesg
syslog
bootctl
32.- Which directory exposes kernel and system information as a pseudo-filesystem?
/proc
/boot
/var
/opt
33.- Which command lists currently loaded kernel modules?
depmod
modinfo
insmod
lsmod
34.- To load a kernel module at runtime, which command is used?
modprobe <module>
insmod -r <module>
rmmod <module>
depmod <module>
35.- Where are modprobe configuration files typically stored for blacklisting modules?
/etc/modprobe.d/
/etc/modules-load.d/
/usr/lib/modprobe.d/
/boot/modprobe/
36.- Which file shows the kernel version currently running?
/etc/os-release
/proc/version
/var/log/messages
37.- Which command updates module dependency and map files?
modprobe -r
38.- Which tool displays PCI devices and vendor/product IDs?
lsusb
lspci
lsblk
hwinfo
39.- Which pseudo-file contains the list of CPU info?
/proc/uptime
/proc/cpuinfo
/proc/meminfo
/proc/stat
40.- Where is the kernel image usually stored on a Linux system?
/bin/vmlinuz
/boot/
/lib/modules/
/usr/src/
41.- What does UEFI system firmware store boot entries in?
MBR boot record
NVRAM
/etc/fstab
42.- Which utility shows and manipulates UEFI boot entries?
grub-install
efibootmgr
systemctl
43.- In MBR partitioning, where is the boot code located?
GPT header
First sector (MBR)
/boot/efi
/etc/grub.d/
44.- What is the purpose of an initramfs/initrd?
Replace the kernel
Provide initial userspace before root FS mounts
Store GRUB configuration
Manage user accounts during boot
45.- Which command regenerates an initramfs on Debian/Ubuntu?
mkinitrd
update-initramfs -u
dracut --force
mkinitcpio -p linux
46.-On systems using dracut, which command rebuilds the initramfs?
update-initramfs
mkinitramfs
genkernel
47.- Which GRUB2 file is automatically generated and should not be edited directly?
/etc/default/grub
/etc/grub.d/40_custom
/usr/lib/grub/menu.lst
48.- Which file configures default GRUB kernel parameters?
/etc/grub.conf
49.- Which command regenerates GRUB configuration (on Debian/Ubuntu)?
grub-mkconfig -o /boot/grub/grub.cfg
update-grub
Both B and C
50.- What does grub-install do?
Create /boot/grub/grub.cfg
Install GRUB bootloader to disk/EFI
Generate initramfs
Update kernel parameters
51.- Which kernel parameter passes options to init (PID 1) or init system?
root=
ro
init=
quiet
52.- To boot into single-user mode with systemd you can append which kernel parameter?
single
systemd.unit=rescue.target
init=/bin/bash
runlevel=1
53.- Which target is analogous to SysV runlevel 3 (multi-user, non-graphical) in systemd?
graphical.target
multi-user.target
rescue.target
default.target
54.- How do you check the default systemd target?
systemctl get-default
systemctl default
systemctl status default.target
systemctl list-unit-files
55.- Which command sets the default systemd target to graphical?
systemctl isolate graphical.target
systemctl set-default graphical.target
systemctl enable graphical.service
systemctl start graphical.target
56.- What does systemctl isolate rescue.target do?
Permanently sets rescue.target as default
Immediately switches to rescue.target (stops other units)
Reboots into rescue mode on next boot
Enables rescue.service at boot
57.- Which SysV file historically defined runlevels?
/etc/systemd/system/default.target
/etc/inittab
/etc/rc.local
/proc/runlevel
58.- In legacy SysV, which runlevel is used for system halt/poweroff?
3
6
59.- Which command in SysV init changes the current runlevel?
systemctl isolate
telinit
runlevel
initctl
60.- What file lists kernel command line at runtime?
/proc/cmdline
