40238963
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Quiz von David OkOk, aktualisiert vor 12 Monate
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Erstellt von David OkOk
vor mehr als ein Jahr
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Frage 1
Frage
1.- Which kernel parameter controls the console verbosity at boot (quiet vs verbose)?
Antworten
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loglevel= or quiet
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verbose=
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console= only
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debug=
Frage 2
Frage
2.- To view the system’s last reboot reason via systemd, which command helps?
Antworten
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last -x Reboot
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journalctl -b -1
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systemctl --failed
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Both A and B (various info)
Frage 3
Frage
3.- Which tool on Debian/Ubuntu lists kernel packages installed so you can match /lib/modules folders?
Antworten
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dpkg -l 'linux-image*'
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rpm -qa kernel
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pacman -Q linux
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apt-cache search linux
Frage 4
Frage
4.- Which systemd directive makes a unit start automatically at boot?
Antworten
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systemctl enable <unit>
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systemctl start <unit>
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systemctl reserve <unit>
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systemctl boot <unit>
Frage 5
Frage
5.- When troubleshooting a failed boot, which of these is the most useful first step?
Antworten
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Examine bootloader config (/boot/grub/grub.cfg) and kernel params
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Reinstall the OS immediately
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Delete /boot contents and retry
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Modify /etc/passwd
Frage 6
Frage
6.- Which command will list active targets and their dependencies?
Antworten
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systemctl list-dependencies --reverse <target>
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systemctl show <target>
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systemctl list-units
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systemctl list-dependencies <target>
Frage 7
Frage
7.- How do you instruct GRUB to boot a kernel with a different root device only for this boot?
Antworten
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Edit kernel root= parameter from GRUB menu before boot
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Change /etc/fstab permanently
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Use grub-set-root after boot
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Reinstall GRUB
Frage 8
Frage
8.- Which file may be used to blacklist an initramfs hook or module in dracut?
Antworten
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/etc/dracut.conf or /etc/dracut.conf.d/*.conf
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/etc/modprobe.d/blacklist.conf only
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/boot/dracut.blacklist
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/etc/initramfs-tools/conf.d/ (dracut uses dracut.conf)
Frage 9
Frage
9.- What command returns the current and previous runlevels on a SysV system?
Antworten
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runlevel
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who -r
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Both A and B
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systemctl runlevel
Frage 10
Frage
10.- Which is the safe sequence to shutdown the machine and power off using SysV utilities?
Antworten
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shutdown -h now
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init 0
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poweroff
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Any of the above (they request a halt/poweroff coordinated by init/systemd)
Frage 11
Frage
11.- Which command is used to list all partitions on all disks?
Antworten
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fdisk -l
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lsblk -f
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blkid
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df -h
Frage 12
Frage
12.- Which tool is used to create or modify GPT partition tables?
Antworten
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fdisk
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parted
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mkfs
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lsblk
Frage 13
Frage
13.- Which command displays information about block devices in a tree structure?
Antworten
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df
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lsblk
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blkid
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mount
Frage 14
Frage
14.- What is the maximum number of primary partitions allowed in an MBR disk?
Antworten
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2
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4
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6
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8
Frage 15
Frage
15.- Which partition type is used to contain logical partitions in MBR?
Antworten
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Swap partition
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Extended partition
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Primary partition
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Boot partition
Frage 16
Frage
16.- Which utility displays filesystem UUIDs and types?
Antworten
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blkid
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df
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ls
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parted
Frage 17
Frage
17.- What is the purpose of the mkswap command?
Antworten
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Mounts swap partitions
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Formats a partition as swap space
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Activates swap memory
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Deactivates swap memory
Frage 18
Frage
18.- Which command activates all swap areas listed in /etc/fstab?
Antworten
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swapon -a
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swapoff -a
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systemctl enable swap
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mount -a
Frage 19
Frage
19.- Which tool can resize partitions interactively on a running system?
Antworten
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parted
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fdisk
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cfdisk
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mkfs
Frage 20
Frage
20.- What command displays the total swap usage?
Antworten
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df -h
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swapon -s
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top
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lsblk
Frage 21
Frage
21.- Which LVM command creates a physical volume?
Antworten
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vgcreate
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pvcreate
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lvcreate
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lvextend
Frage 22
Frage
22.- Which file contains partition information for traditional systems?
Antworten
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/etc/partitions
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/proc/partitions
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/etc/fstab
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/boot/grub/grub.cfg
Frage 23
Frage
23.- Which command initializes a volume group in LVM?
Antworten
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lvcreate
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vgcreate
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pvcreate
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vgextend
Frage 24
Frage
24.- Which tool is used to create logical volumes?
Antworten
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lvcreate
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vgcreate
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pvcreate
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mkfs
Frage 25
Frage
25.- Which command extends an existing logical volume?
Antworten
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lvextend
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pvextend
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vgextend
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resize2fs
Frage 26
Frage
26.- Which file defines partitions mounted automatically at boot?
Antworten
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/etc/partitions
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/etc/fstab
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/etc/mounts
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/proc/mounts
Frage 27
Frage
27.- What is the function of vgextend?
Antworten
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Add a new logical volume
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Add a physical volume to a volume group
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Extend a logical volume
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Display volume groups
Frage 28
Frage
28.- Which command displays all existing volume groups?
Antworten
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lvdisplay
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vgdisplay
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pvdisplay
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lvs
Frage 29
Frage
29.- What command is used to create a GPT partition table?
Antworten
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fdisk /dev/sda
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parted /dev/sda mklabel gpt
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mkfs.gpt /dev/sda
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gdisk --gpt /dev/sda
Frage 30
Frage
30.- Which tool is used to create a new filesystem on a partition?
Antworten
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mkfs
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fdisk
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parted
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mount
Frage 31
Frage
31.- Which command can display filesystem usage and available space?
Antworten
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du
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df -h
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lsblk
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mount
Frage 32
Frage
32.- What is the name of the metadata area in an LVM physical volume?
Antworten
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PE (Physical Extent)
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VG descriptor
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PV header
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LV header
Frage 33
Frage
33.- What is the smallest unit of allocation in LVM?
Antworten
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Physical volume
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Volume group
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Physical extent
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Logical volume
Frage 34
Frage
34.- Which tool displays UUIDs for swap and partitions?
Antworten
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lsblk -f
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blkid
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cat /etc/fstab
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df -T
Frage 35
Frage
35.- Which command creates a swap file of 1 GB size?
Antworten
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dd if=/dev/zero of=/swapfile bs=1M count=1024
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mkswap /swapfile 1G
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mkfile 1G /swapfile
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swapon /swapfile
Frage 36
Frage
36.- Which command displays detailed information about logical volumes?
Antworten
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lvdisplay
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vgdisplay
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pvdisplay
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lvscan
Frage 37
Frage
37.- Which command creates a snapshot of a logical volume?
Antworten
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lvcreate -s
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vgcreate -s
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pvcreate -s
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lvextend -s
Frage 38
Frage
38.- What is the main purpose of an LVM snapshot?
Antworten
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To back up data consistently
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To extend a logical volume
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To resize a filesystem
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To defragment storage
Frage 39
Frage
39.- Which command removes a logical volume?
Antworten
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lvdelete
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lvremove
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vgremove
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pvremove
Frage 40
Frage
40.- To resize a filesystem after extending an LVM volume, which command is used for ext4 filesystems?
Antworten
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resize2fs
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xfs_growfs
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fsck
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mkfs.ext4
Frage 41
Frage
41.- What must be done before reducing a logical volume’s size?
Antworten
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Run vgextend
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Unmount the filesystem and shrink it first
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Add more physical extents
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Activate the volume group
Frage 42
Frage
42.- Which LVM command deactivates a volume group?
Antworten
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vgdeactivate
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vgchange -a n
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vgstop
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vgremove
Frage 43
Frage
43.- What is the default size unit for LVM extents?
Antworten
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2 MB
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4 MB
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8 MB
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16 MB
Frage 44
Frage
44.- Which command creates a new swap area on an existing partition?
Antworten
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mkfs.swap /dev/sdb2
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mkswap /dev/sdb2
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swapon /dev/sdb2
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swapcreate /dev/sdb2
Frage 45
Frage
45.- How can you permanently enable a swap file?
Antworten
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Add it to /etc/fstab
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Run swapon -a once
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Modify /etc/swap.conf
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Use systemctl enable swap
Frage 46
Frage
46.- Which command shows all currently active swap areas?
Antworten
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cat /proc/meminfo
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swapon --show
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free -m
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lsblk
Frage 47
Frage
47.- Which filesystem type is used for Linux swap space?
Antworten
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ext4
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swapfs
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swap
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none
Frage 48
Frage
48.- What happens when physical memory is exhausted and no swap is available?
Antworten
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The system slows down
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The kernel kills processes (OOM killer)
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The system reboots
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Swap is created automatically
Frage 49
Frage
49.- Which command converts an MBR disk to GPT safely (non-destructive)?
Antworten
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gdisk
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fdisk
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parted mklabel
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mkfs.gpt
Frage 50
Frage
50.- Which partition flag marks a partition as bootable in MBR?
Antworten
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boot
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active
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bios_grub
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uefi_boot
Frage 51
Frage
51.- How can you view partition table type (MBR or GPT)?
Antworten
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cat /etc/fstab
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parted /dev/sda print
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lsblk -a
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blkid
Frage 52
Frage
52.- Which tool is preferred for managing GPT disks interactively?
Antworten
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cfdisk
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gdisk
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fdisk
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mkfs
Frage 53
Frage
53.- What is the purpose of the /etc/lvm/backup/ directory?
Antworten
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Stores volume group metadata backups
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Contains LVM log files
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Lists all mounted LVs
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Holds filesystem backups
Frage 54
Frage
54.- Which command shows the mapping between logical and physical extents?
Antworten
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lvdisplay -m
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vgdisplay -v
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pvscan
-
lvscan
Frage 55
Frage
55.- Which LVM command removes a volume group?
Antworten
-
vgdelete
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vgremove
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lvremove
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pvremove
Frage 56
Frage
56.- Which command initializes a disk as an LVM physical volume?
Antworten
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lvcreate /dev/sdb
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vgcreate /dev/sdb
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pvcreate /dev/sdb
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lvm /dev/sdb
Frage 57
Frage
47.- Which command lists all volume groups on the system?
Antworten
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vgs
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pvs
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lvs
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vgscan
Frage 58
Frage
58.- How can you identify all physical volumes currently present?
Antworten
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vgdisplay
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pvdisplay
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lvdisplay
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pvlist
Frage 59
Frage
49.- Which command enables you to label a partition manually?
Antworten
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e2label
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lsblk -L
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fdisk -L
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blkid -L
Frage 60
Frage
60.- Which command verifies the integrity of an ext4 filesystem?
Antworten
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fsck.ext4
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mkfs.ext4
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resize2fs
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tune2fs
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