Notes

#!/bin/bash

function newuser(){ #function created named as new user
read -p "Please!. Give name of user - " addUN ##user should input name of user
if [[ $addUN =~ ^[A-Z|0-9|a-z]+$ ]]; then
sudo newuser $addUN ##proceed
echo -e " User Sucessfully added. " ##message is displayed

else #continue
"Please!. Give valid input." ##message displayed on the screen

fi #end of if statements
listing_user
}
function newgroup(){ ##function created name as newgroup
read -p "Please!. Give name of group - " addGRP #user should input name of group
if [[ $addGRP =~ ^[A-Z|0-9|a-z] ]]; then ##if function is used to check input value from user
sudo newgroup $addGRP ##group added procced
echo -e "Group Sucessfully added." ##message displayed on the screen
else
echo -e "Please!. Give valid input." #message displayed

fi #end of if statemnts
listing_user #function
}
function useredited(){ #function is created named as useredited
read -p "Please!. Give name of user which u want to edit - " editUN ##message displayed on the scren
if [[ $(grep $editUN /etc/group |wc -l) -eq 1 ]]; then ##id statements is used
read -p "Give new username - " newUN ##user should input the name
sudo usermod -l $newUN $editUN ##process
echo -e "Sucessfully user edited." #message of sucessfull is hown

else #continue
echo -e "Please!. Give valid input.." #message shown in screen when input is wrong

fi ##end of if statemnts
listing_user ## function called as manin function
}
function groupedited(){ ##fi=unction name is given as groupedited
read -p "Please!. Give name of group which you want to edit - " editGN ##message which will be displayed on the screen
if [[ $(grep $editGN /etc/group |wc -l) -eq 1 ]]; then ##if condition is used
echo -e "Give new group name which you want to edit- " ##user input is taken
read newGN ##read new groupname
sudo groupmod -n $newGN $editGN ##new groupname
echo -e "gSucessfully group edited." ##message shown

else ##continue
echo -e "Please!. Give valid input." ##message displayed on the screen

fi #end of if statements
listing_user ## function called as main function
}

function touserdelete(){ ##function names as touserdelete
read -p "Please!. Give name of user which you want to delete - " delUN #3message displayed on the screen
# if [[ $(grep $delUN /etc/group |wc -l) -eq 1 ]]; then
sudo userdel $delUN ##to delete username
echo -e "Sucessfully user deleted." ##message displayed on the screen



listing_user ##function called as main function
}
function groupdelete(){
read -p "Please!.Give name of group which you want to delete- " delGN
# if [[ $(grep $delGN /etc/group |wc -l) -eq 1 ]]; then
sudo groupdel $delGN ##process proceed
echo -e "Sucessfully group deleted." ##message displayed on the screen
listing_user #functon called as main function
}
function listing_user(){ ##function name is given as listing_user
echo -e "1. Press 1 to Add User " ##option to add user
echo -e "2. Press 2 Add group " ##option to add group
echo -e "3. Press 3 Edit user " ##optionto edit user
echo -e "4. Press 4 Edit group " ##option to edit group
echo -e "5. Press 5 delete user " ##option to delete user
echo -e "6. Press 6 delete group " ##option to delete group
read -p "Choose any option 1 yo 6: " listingoption
if [[ $listingoption =~ ^[1-6]+$ ]]; then ##if fucntion is used
case $listingoption in ##list of option
1) newuser ;; ##to add new user
2) newgroup ;; ##to add new group
3) useredited ;; ##to edit user
4) groupedited ;; ##to edit group
5) touserdelete ;; ##to delete user
6) groupdelete ;; ##to delete group
esac ##end of fucntion
fi ##if function end
}
listing_user ## function call from main function
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