#!/bin/bashread -p "Enter the User Password : " PASSWDfor UNAME in `cat users.txt`doid $UNAME &> /dev/nullif [ $? -eq 0 ];then echo "Already exists"elseuseradd $UNAME &> /dev/nullecho "$PASSWD" | passwd --stdin $UNAME &> /dev/nullif [ $? -eq 0 ];thenecho "Create "$UNAME"  success"else echo "Create failure"fifidone

#!/bin/bashfor UNAME in `cat users.txt`do      grep $UNAME  /etc/passwd &> /dev/null   if [ $? -eq 0 ]   then        userdel -r $UNAME        echo "$UNAME is deleted!"    else        echo "$UNAME is not exist"   fidone