I just downloaded lsws and here are the errors I get, --- Installing, please wait... groupadd: group lsadm exists useradd: user lsadm exists usermod: unknown group apache chgrp: invalid group: `apache' Your current PHP engine /usr/local/lsws/fcgi-bin/lsphp is renamed to lsphp.old chown: invalid user: `apache:apache' chown: invalid user: `apache:apache' Congratulations! The LiteSpeed Web Server has been successfully installed. Command line script - "/usr/local/lsws/bin/lswsctrl" can be used to start or stop the server. ----- When you replace Apache with LiteSpeed, remember to stop Apache completely. On most Linux servers, you should do: service httpd stop chkconfig httpd off or service apache stop chkconfig apache off If "Port Offset" has been set to "0", you should do it now. Press [ENTER] to continue Would you like to start it right now [Y/n]? Y [OK] Your trial license key will expire in 14 days! [ERROR] Failed to start lshttpd! lshttpd: no process killed [OK] Your trial license key will expire in 14 days! [ERROR] Failed to start lshttpd! [ERROR] Failed to start the web server. For trouble shooting information, please refer to documents in "/usr/local/lsws/docs/". ---- Ubuntu's apache user is www-data, is that what's causing this problem ?