Shell Programming and Scripting

mkdir -p /home/admin/useraccounts
for (( i=0; i<=500; i++ )) 
do
        #Create users whose name starts with baci, 
        #so this script will create baci1, baci2, baci3 etc depending on i value.   
   useradd baci$i
   < /dev/urandom tr -dc A-Na-n1-9_ |\
   head -c8 > /tmp/passwd.txt
        #this command is bit tricky, < /dev/urandom  
        #will generate all the random characters which are not even present
        #on keyboard.. and tr -dc A-Na-n1-9, will display only characters
        #which are from A to N, a to n and 1 to 9. This is to avoide o(small o),  
        #O(capital o), 0(numerical zero) characters in order to remove 
        #confusion in the password.  #And there is no character limit.   so head -c8
        #will limit the random characters to just 8
 
done   # was missing!!!  (VBE)