#!/bin/bash
if [ $(id -u) -eq 0 ]; then
  read -p "Insert username" username
  read -s -p "Insert password" password
  grep '$username' /etc/passwd >/dev/null
  if [ $? -eq 0 ]; then
    echo "User exists"
    exit 1
  else
    useradd -m -p $password $username
    [ $? -eq 0 ] $$ echo "Success" || echo "Failed"
  fi
else
  echo "Youre not root, could not do this"
  exit 2
fi

[root@ip-10-0-7-125 script_collection]# ./them_user.sh
Insert usernameoidech
Insert password./them_user.sh: line 11: [: missing `]'
Failed

#!/bin/bash
if [ $(id -u) -eq 0 ]; then
  read -p "enter username: " username
  read -s -p "enter pass: "  password
  egrep "^$username" /etc/passwd >/dev/null
  if [ $? -eq 0 ]; then
     echo "$username exists"
     exit 1
   else
     pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)
     useradd -m -p $pass $username
     [ $? -eq 0 ] && echo "User has been added to system" || echo "Failed"
   fi
else
    echo "only root could add"
    exit 2
fi