Linux
Right now, I prefer Fedora for my servers. I'm a big fan of systemd - I think it makes configuration much easier and more consistent. I also like DNF for package management.
        
Servers
Must-have servers on a Linux Server installation:
    
        | Server | 
        Title | 
        How-To Guide | 
        Config File(s) | 
    
    
        | DNS | 
        named | 
        
            Install 
            Config
         | 
        
            /etc/named.conf 
            /var/named/zones/yourdomain.com 
            /var/named/zones/0.0.10.in-addr.arpa 
         | 
    
    
        | DHCP | 
        dhcpd | 
        
            Install 
            Config
         | 
        
            /etc/dhcp/dhcpd.conf  
            /etc/dhcp/dhcpd6.conf 
         | 
    
    
        | BitTorrent Client | 
        transmission-daemon | 
        
            Install 
            Config
         | 
        
            /var/lib/transmission/.config/transmission-daemon 
         | 
    
    
        | Web-based SSH Client | 
        (Still looking...) | 
        
            Install 
            Config
         | 
        [TBD] | 
    
    
        | Dynamic DNS Client | 
        ddclient | 
        
            Install 
            Config
         | 
        
            /etc/ddclient/ddclient.conf 
            /etc/systemd/system/multi-user.target.wants/ddclient.service (custom file)
         | 
    
 
    
Utilities
Linux programs I use on the daily:
    
        | Utility | 
        Title | 
        Config File(s) | 
    
     
        | Shell | 
        Bash (Bourne Again SHell) | 
        ~/.bashrc | 
    
    
        | Text Editor | 
        ViM | 
        ~/.vimrc | 
    
    
        | Terminal Multiplexer | 
        tmux | 
        n/a |