Shell scripting: Implementing Linux User management and monitoring through the shell

Learn the first script from the shell, thanks to cloud Li Qiangqiang Teacher's shell programming tutorial

To create a shell script file:

Touch menu.sh

Touch index.sh

Touch welcome.sh

To give the script file permission to execute:

chmod a+x menu.sh index.sh welcome.sh

menu.sh

#! / bin / bash
# menu.sh
function menu () {
title = "My Home"
name = "Randy"
time = `date +% Y-% m-% d`
cat << qaz
################################################ #####################
## *** `echo -e" \ e [32m $ title \ e [0m "` *** ##
################################################ #####################
## 1) Add a user ##
## 2) View all users ##
## 3) Set passwd for user ##
## 4) Delete a user ##
## 5) Print disk space ##
## 6) Print mem space ##
## 7) Retrun menu ##
## 8) Logout ##
## 9) Quit ##
################################################ #####################
## Name: $ name Date: $ time ##
################################################ #####################
qaz
}
4.index.sh

#! / bin / bash
# index.sh
function index () {
clear
. menu.sh
menu
while true
do
read -p "Please input a option:" option
case $ option in
1)
read -p "Please input username:" name
useradd $ name &> / dev / null
if [$? -eq 0]; then
echo "user $ {name} is created successfully !!!"
else
echo "user $ {name} is created failly !!!"
fi
;;
2)
str = `cat / etc / passwd | awk -F:‘ {print $ 1} ’`
echo -e "\ e [32m $ str \ e [0m"
;;
3)
read -p "input the username:" name
read -p "set password for the user:" pass
echo $ pass | passwd --stdin $ name &> / dev / null
if [$? -eq 0]; then
str = "$ {name}‘ s password is set successfully "
echo -e "\ 033 [30; 47 $ str \ 033 [0m"
else
str = "$ {name}‘ s password is set failly !!! "
echo -e "\ 033 [31; 47m $ str \ 033 [0m"
fi
;;
4)
read -p "delete the user:" name
userdel -r $ name &> / dev / null
if [$? -eq 0]; then
str = "user $ {name} is delete successfully !!!"
echo -e "\ 033 [30; 47m $ str \ 033 [0m"
else
str = "user $ {name} is delete failly !!!"
echo -e "\ 033 [31; 47m $ str \ 033 [0m"
fi
                ;;
5)
str = `df -Th`
                echo -e "\ 033 [30; 47m $ str \ 033 [0m"
;;
                6)
str = `free -m`
echo -e "\ 033 [30; 47m $ str \ 033 [0m"
                ;;
7)
clear
menu
                ;;
8)
echo -e "\ e [31mLogout ... \ e [0m"
sleep 1
break
;;
                9)
                        echo -e "\ e [31mQuit successfully !!! \ e [0m"
                        exit
;;
*)
str = "Input error please re-enter"
echo -e "\ 033 [30; 47m $ str \ 033 [0m"
;;
esac
done
}
5.welcome.sh

#! / bin / bash
#welcome
clear
echo -e "\ e [31mWelcome \ e [0m"
while true
do
read -p ‘Please enter user name (Quit please input" q "):‘ name
if [$ name = "q"]
then
break
else
read -p ‘Please enter user password:’ password
if [$ name = ‘admin‘] && [$ password = ‘admin‘]
then
str = "Login successfully, Please Wait ......"
echo -e "\ e [31m $ str \ e [0m"
sleep 2
. index.sh
index
else
str = "Login failly"
echo -e "\ e [31m $ str \ e [0m"

fi
fi
done
6. Interface display:

650) this.width = 650; "src =" http://s2.51cto.com/wyfs02/M01/83/DE/wKiom1d-XNrR4jb0AAJsrLezAKM980.jpg-wh_500x0-wm_3-wmp_4-s_976144196.jpg "title =" shell .jpg "alt =" wKiom1d-XNrR4jb0AAJsrLezAKM980.jpg-wh_50 "/>



This article is from the "Guo Xin Technology Blog" blog, please keep this source http://guoxin2014.blog.51cto.com/4020074/1812435

Shell script: Linux user management and monitoring through the shell