hi
I am preparing to GNU/Linuxify my fathers business, is there anything i should be aware of?
If you're replacing his server, then not really. Samba will do everything you need for a windows domain controller. You can get clever and do things from LDAP, but it's not required for a basic system. If you're talking about his desktops, then be very careful that he doesn't have any custom windows applications that he relies on, or websites that require activeX controls. These may work via WINE, but test *before* you start any deployment. You'll almost definitely be changing office suites, so be prepared for the inevitable "I can't open Office 2007 documents" type of question. In general, users resist change. There's always exceptions, but be prepared for people resisting the change ("it used to work like XYZ, why can't it do that now?" "Can't we have the old system back?" etc). Plan some decent training and set aside time to do it. If the office suite / web browser / email client you're planning on moving them to has windows versions (eg, like openoffice, firefox and thunderbird do), then consider moving people onto these applications first, perhaps one application at a time, and then changing the OS later.