View difference between Paste ID: Z5T7GS4J and raC75Vse

 import os
 
 # This application writes a file used by SSH to block user accounts
 # when their shadow password is disabled. It only does it for users
 # in the group 'users' to avoid adding useless denials for things
 # like daemons and services.
 #
 # It solves the problem where SSH users with pubkey auth can still
 # use a system when the account password is voided with this command:
 # passwd -l user
 #
 # This program is licenced under the MIT licence. For more information
 # read the LICENCE file in the directory.
 #
 # It was made for the Tate Dev Ops product Enterprise Gentoo Hardened.
 
 # this method makes an array of groups of users
 def get_group_users():
     f = open('group.example', 'r')          #f is file
 
     users = []                              #obvious
     for l in f:                             #l is line
         g = l.split(':')                    #g is group
         if (g[0] == "users"):
             for u in g[3].split(','):       #u is user
                 users.append(u.rstrip())
 
     return users
 
 #this method makes an array of blocked shadow passwords
 def get_users_blacklist(users):
     f = open('shadow.example', 'r')         #f is for file
 
     blacklist = []                          #obvious
     for l in f:                             #l is for line
         s = l.split(':')                    #s is for shadower
         for u in users:                     #u is for user
             if (u == s[0]):
                 if (s[1] == "!"):
                     blacklist.append(u)
 
     return blacklist
 
 def write_ssh_blacklist(blacklist):
     f = open('sshd_blacklist_config.example', 'w') #f is file
 
     ds = "DenyUsers "                       #d is denystring
 
     for u in blacklist:                             #u is users
-        ds = ds + u
+        ds = ds + " " + u
 
     f.write(ds)
     f.write('\n')
     f.close()