Shell Scripting Learning Notes: 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

1. To create a shell script file:
   

   Touch menu.sh

   Touch index.sh

   Touch welcome.sh

2. To give the script file permission to execute:

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

3. menu.sh

#!/bin/bash#menu.shfunction 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: $nameDate: $time      ############ ############################################################ #qaz}

4.index.sh

#!/bin/bash#index.shfunction index ()  {clear. menu.shmenuwhile truedoread -p  " Please input a option: " optioncase  $option  in1) read -p " please  Input username: " nameuseradd  $name  &>/dev/nullif [ $? -eq 0  ];thenecho  "user ${name} is created successfully!!!" elseecho  "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:"  nameread -p  "set password for  the user: " passecho  $pass  | passwd --stdin  $name  &>/dev/ Nullif [ $? -eq 0 ];thenstr= "${name} ' s password is set  Successfully "echo -e " \033[30;47$str\033[0m "elsestr=" ${name} ' s password is&Nbsp;set failly!!! " echo -e  "\033[31;47m$str\033[0m" FI;; 4) read -p  "Delete the user:"  nameuserdel -r  $name  &>/dev/nullif  [ $? -eq 0 ];thenstr= "user ${name} is delete successfully!!!" echo -e  "\033[30;47m$str\033[0m" elsestr= "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) clearmenu                ;; 8) echo -e  "\e[31mlogout ...\e[0m" sleep 1break;;                 9)                           echo -e  "\e[31mquit successfully!!! \e[0m "                         exit;; *) str= "Input error please re-enter" echo -e  "\033[30;47m$str\033[0m";; Esacdone}

5.welcome.sh

#!/bin/bash#welcomeclearecho-e "\e[31mwelcome\e[0m" while Truedoread-p ' please enter the user name (Quit please input "q"): ' Nameif [$name = "Q"]thenbreakelseread-p ' Please enter user password: ' passwordif [$name = ' admin '] && [$pas Sword = ' admin ']thenstr= "Login successfully,please Wait ..." echo-e "\e[31m$str\e[0m" Sleep 2. Index.shindexelsestr= " Login failly "echo-e" \e[31m$str\e[0m "Fifidone

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 be sure to keep this source http://guoxin2014.blog.51cto.com/4020074/1812437

Shell Scripting Learning Notes: Implementing Linux User management and monitoring through the shell