Did you reboot or restart any of the Linux system services? If not, you'll need to...

Also see: Linux - if I change the hostname, which services need to be restarted?

linux server still recognizes the old domain after changing it to new one
In a Youtube video on the D5200 I saw that the guys handling the camera rotated the command dial very fast. 

I used to rotate the dial one jump at a time fearing that otherwise I would damage the dial or the internal circuit. Is my assumption right or wrong?
