YUM

Question 1

Only check for available list of updates

Answer 1

yum check-update
then,
yum update httpd

Question 2

Search online repos with updates to upgrade packages with yum

Answer 2

yum update

Question 3

Get info about specific package with yum

Answer 3

yum info httpd

Question 4

Display all packages installed by yum

Answer 4

yum list installed | grep httpd

Question 5

Clean yum cache info and its local db file

Answer 5

yum clean all

Question 6

Install/remove/reinstall app with yum

Answer 6

yum -y install httpd
yum remove httpd
yum reinstall httpd
yum localinstall htop

Question 7

Remove package and it dependencies with yum

Answer 7

yum autoremove httpd

Question 8

Find with yum what package provides a specified file name

Answer 8

yum whatprovides */htpd

yum provides /var/www => httpd -the basic dir for Apache HTTP server

Question 9

Download a package with yum

Answer 9

yum install yum-utils

yumdownloader htop

Question 10

Yum global conf file
Yum’s repositories
Yum cash location of latest requests

Answer 10

/etc/yum.conf
/etc/yum.repos.d/
/var/cache/yum

Question 11

Rpm DB location

Answer 11

/var/lib/rpm

Question 12

Repair corrupted rpm db

Answer 12

rpm –rebuilddb

Question 13

List files in rpm package

List files in app

Answer 13

rpm -qpl htop.2.2.0.rpm

rpm -ql htop

Question 14

Display info on rpm package

Answer 14

rpm -qpi htop.2.2.0.rpm

the info as yum info htop would provide

Question 15

List all rpm packages installed on a system

Answer 15

rpm -qa | grep htop

the same as yum list installed would provide

Question 16

Uninstall rpm package

Answer 16

rpm -e htop

Question 17

Verify installed rpm packages

Answer 17

rpm -Va

Question 18

Query if rpm package is installed

Answer 18

rpm -q htop

Question 19

List conf files of rpm package
List doc files of rpm package
Show info about package the file belongs to

Answer 19

rpm -qc sysstat
rpm -qd sysstat
rpm -qf /etc/request-key.conf =>keyutils.1.5-10

Question 20

Install rpm package

Answer 20

rpm -ivh htop.2.2.0.rpm

Question 21

RHEL8 app stream and modules

Answer 21

App streams are to separate user space apps from kernel operations
BaseOs repo is for base packages
App stream delivered in 2 formats:
-rpms
-modules
Modules can contain multiple streams to make multiple versions of apps available
Modules can have profiles. Profile- list of packages to a specific use-case (min, recommended, complete installation etc)

Question 22

Show module list

Answer 22

yum module list

Question 23

Search the module that provides httpd package

Answer 23

yum module provides httpd

Question 24

Get more info about module

Answer 24

yum module info php

Question 25

Show profiles of a module

Answer 25

yum module info –profile php

Question 26

Show list of streams for a module

Answer 26

yum module list php

Question 27

Install module with yum module

Answer 27

yum module install php:7.1
\_\_\_\_\_\_\_\_\_\_\_\_\_\_
yum module install php:7.2. This will disable 7.1. steram and 7.2 will be enabled

Question 28

Install specific profile of the module

Answer 28

yum module install php:7.1/devel

Question 29

Enable specific module

Answer 29

yum module enable php:7.1

Question 30

List all yum groups including hidden groups

List all yum groups installed

Answer 30

yum groups list hidden

yum groups list installed

Question 31

Get info about a specific yum group

Answer 31

yum groups info “Network File System Client”

Question 32

Install specific yum group

Answer 32

yum groups install “Network File System Client”

Question 33

Show yum commands history

Answer 33

yum history

yum history info id

Question 34

Undo a command from yum history

Answer 34

yum history undo 3 (id)

id can be got by yum history