RHCSA Ch4

Question 1

list dnf repositories

Answer 1

dnf list

Question 2

list information on a specific package with dnf

Answer 2

dnf info dnf

dnf is the package

Question 3

list all dnf group s

Answer 3

dnf group list

Question 4

search for packages

Answer 4

dnf search vim

Question 5

Reinstall a package

Answer 5

sudo dnf reinstal vim

Question 6

update a package

Answer 6

dnf list updates

sudo dnf upgrade python3

Question 7

delete a package

Answer 7

sudo dnf remove teamd

Question 8

remove any unused dependencies

Answer 8

sudo dnf autoremove

Question 9

upgrade all packages except one

Answer 9

sudo dnf upgrade -x kernel*

Question 10

install a specific version of a package and do not allow updates

Answer 10

sudo dnf install python3-dnf-plugin-versionlock

Question 11

disable kernel upgrades

Answer 11

sudo dnf versionlock add kernel-4.18.0-193.el8

Question 12

where does the kernel reside and what is the name?

Answer 12

/boot

vmlinuz

Question 13

how do you make edit to grub and how the system boots

Answer 13

edit /etc/default/grub

then run - sudo grub2-mkconfig

Question 14

Boot into different kernel

Answer 14

sudo grub2-set-default 1
*** newest version is 0, second newest is 1 etc…
sudo grub2-mkconfig

Question 15

list modules of current kernel

Answer 15

lsmod

Directory location:
ls /lib/modules/$(uname -r)/kernel
*** $(uname -r) runs the uname command and passes it as a variable

Question 16

get information on a module

Answer 16

modinfo dm-mirror

dm-mirror is a module