rinri
/
system-and-network-administration-course
1
0
Fork 0
Code Issues 0 Pull Requests 0 Releases 0 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1 Commit
1 Branch
1.6 MiB
 
 
 
Tree: 89edcc5866
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '89edcc5866'
${ noResults }
system-and-network-administ.../week2/lab2-solution.org

3.5 KiB
Raw Blame History

Lab2 Solution Amirlan Sharipov (BS21-CS-01)

Questions 1

What is fdisk utility used for?

to manipulate disk partition table

Show the bootable device(s) on your machine, and identify which partition(s) are bootable.

Output of fdisk -l:

… Device Start End Sectors Size Type /dev/sdb1 2048 34815 32768 16M Microsoft reserved /dev/sdb2 34816 524285951 524251136 250G Microsoft basic data /dev/sdb3 524285952 659988479 135702528 64.7G Linux filesystem /dev/sdb4 659988480 863920127 203931648 97.2G Linux filesystem /dev/sdb5 958291968 975173631 16881664 8G Linux swap /dev/sdb6 975173632 976773134 1599503 781M EFI System /dev/sdb7 863920128 956194815 92274688 44G Linux filesystem /dev/sdb8 956194816 958291967 2097152 1G EFI System

Answer

/dev/sdb6 and /dev/sdb8 are bootable partitions

What is logical block address?

is a scheme to index the locations of logical blocks of a device. Starts with LBA 0

Why did we specify the count, the bs, and the skip options when using dd?

Number of blocks, block size, and how many blocks to skip

Why does a GPT formatted disk have the MBR?

To maintain compatibility and protect GPT disk and from MBR-based disk utilities.

Name two differences between primary and logical partitions in an MBR partitioning scheme

There can be only 4 primary partitions in MBR disk, while there can be many logical ones on top of an extended partition. Some operating systems cannot boot from a logical partition.

Questions 2

Why is Shim used to load the GRUB bootloader?

To make Secure Boot mechanism work.

Can you locate your grub configuration file? Show the path.

/boot/grub/grub.cfg Also, there is /etc/default/grub which can be used to generate a grub config using grub-mkconfig

According to the boot order, what is the third boot device on your computer? How did you check this?

BootCurrent: 0003 Timeout: 0 seconds BootOrder: 0003,0004,0009,0001,0002,0000,2001,0006,0005,2002,2003 … Boot0009* Artix HD(10,GPT,… It's Artix on my hard drive, accoding to efibootmgr -v

Questions 3

How many inodes are in use on your system? 

df --output=source,iused

Filesystem      IUsed
dev               717
run              1314
/dev/sdb3      720461
tmpfs               1
tmpfs              22
/dev/sdb4      677792
/dev/sdb6           0
tmpfs              71
/dev/sda9       16193
/dev/sda8       33171

What is the filesystem type of the EFI partition?

FAT32

What device is mounted at your root / directory? Show proof. 

lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda      8:0    0 931.5G  0 disk
...
sdb      8:16   0 465.8G  0 disk
├─sdb1   8:17   0    16M  0 part
├─sdb2   8:18   0   250G  0 part
├─sdb3   8:19   0  64.7G  0 part /
├─sdb4   8:20   0  97.2G  0 part /home
├─sdb5   8:21   0     8G  0 part [SWAP]
├─sdb6   8:22   0   781M  0 part /boot
├─sdb7   8:23   0    44G  0 part
└─sdb8   8:24   0     1G  0 part

/dev/sdb3

What is your partition UUID?

For PARTUUID: 

lsblk -dno PARTUUID /dev/sdb3

fbef9613-fbf5-8445-8d1c-7a63709d1229

Show at least two methods of viewing the UUID of a block device.

lsblk -dno UUID /dev/sdb3 blkid

What is the function of /dev/zero?

Source of zero bytes. Can be used with dd to fill a file with zeros.