Not really a HN-quality article. The description of the signals is wrong or at least misleading. HUP is not the signal that is sent to make a program reload, HUP is the signal that is sent when the terminal is going away. HUP is used by some daemons to trigger a reload, but others use USR1 or USR2. The description of QUIT is similarly misleading; most terminals set C-\ to generate it, not CTRL+SHIFT as the article mentions.
Finally, 8) should not be rendered as a smiley face with sunglasses.