Shell Programming and Scripting

# usermod -G wheel pkbond

# cat /usr/etc/.paramlist
ab01 passab01 pkbond
ab02 passab02 ??????

[pkbond@rhnserver ~]$ ./justdoit
Before  running script
/home/oper/pkbond
uid=514(pkbond) gid=514(oper)
mkdir: cannot create directory `/home/oper/ab01': Permission denied
Only root can do that.
ab01 processes are OK!!
 
After running script
/home/oper/ab01
uid=514(ab01) gid=514(oper)
 
ab02 is not logged or is not parameter list!!

[pkbond@rhnserver ~]$ cat justdoit
#!/bin/bash
## justdoit
parameterfile=/usr/etc/.paramlist
#chown pkbond.pkbond $parameterfile
#chmod go-rwx $parameterfile
shopt -s expand_aliases
alias usermod='sudo '/usr/sbin/usermod' '
HOME=/home/oper
USER=$(id -un)
change_users () {
 while read -r newuser passwd loggeduser
  do
   if [[ $(who -u | grep $USER ) ]] && [[ $(echo $loggeduser | grep $USER) ]]  ; then
    echo -e "Before  running script \n$(finger $USER |awk '/Direct/ { print $2 }') \n$(id $USER |sed 's/\([^ ]* [^ ]*\).*/\1/')\n"
    mkdir -p $HOME/$newuser ; usermod -d $HOME/$newuser $USER
    usermod -l $newuser $USER ; echo "$passwd" | passwd --stdin $newuser ; echo "$newuser processes are OK!!" ; echo
    echo -e "After running script \n$(finger $newuser |awk '/Direct/ { print $2 }') \n$(id $newuser |sed 's/\([^ ]* [^ ]*\).*/\1/')"
   else
    echo -e "\n$newuser is not logged or is not parameter list!!"
   fi
  done < $parameterfile
}
change_users ""