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-Linux Administration Training

ssh based authentication:  https://stackoverflow.com/questions/66452084/ssh-authentication-process

Lab1:
    1) You should know the basic commands

#How to create  a directory

mkdir testing

# How to go inside the directory

cd testing

#Create a empty file

touch readme
#See contents of file

cat readme

#List all file

ls

ls -ltr

ls -la

# How to come out from directory

cd ..

#Help page of any command
man cat
man ls
man mkdir
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Selinux vs apparomor

https://www.techtarget.com/searchdatacenter/tip/Compare-two-Linux-security-modules-SELinux-vs-AppArmor


Lab

#udpate the pacakge list

sudo apt-get update

#Install package
sudo apt-get install apache2

#remove the package
sudo apt-get remove apache2

#Redhat/centos linux dnf

Lab 4:

sudo adduser training

#It will prompt for password.. provide any passowrd

#Login to the user
su training

#try below activty
sudo apt-get update

#It will give an error

training is not in the sudoers file

--------------------

Lab 5:

sudo vi  /etc/sudoers

#Press i <insert mode>

training  ALL=(ALL:ALL) ALL

#You need to press esc+:+wq+! (escape colon wq !)

#Now test
su training
sudo apt-get update

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