adding customization for new and existing user and displaying a welcome message

1) edit the skeleton file

nano /etc/skel/.bashrc

2) Add customizations  (We will apply default editor and a message it times user logged in)

add these content to   /etc/skel/.bashrc

export EDITOR=/usr/bin/nano

echo   "welecome $(whoami),  all your activity on this system is monitored"

3) Apply changes

 source  /etc/skel/.bashrc

4) Test creating a new user

useradd  kathy -m -c "guest account"

5) verify   reading the content user's .bashrc file

cat  /home/kathy/.bashrc

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If you want customization for an existing user, edit the user  .bashrc file, in this example we will do it with the user kathy

1) nano  /home/kathy/.bashrc

2) add changes

export EDITOR=/usr/bin/vi

echo   "Hello dear  $(whoami)"

3) save it

source /home/kathy/.bashrc