On my reelbox (running Ubuntu) I have found a file in /etc/init that contains the following# frontpanel-pre - check for frontpanel CAPs and adjust time#description     check frontpanel caps#start on starting mountall#start on tty-device-added DEVNAME=/dev/ttyS0taskscript        (        /sbin/dev_frontpanel.sh        /sbin/reelfpctl -capability        ) > /dev/.frontpanel.caps        initctl emit --no-wait frontpanel-linkedend scriptI wonder if the dot in /dev/.frontpanel has some special meaning in linuxI thought the output of the commands in the brackets will be written to a file called .frontpanel.caps in /dev/ but there is no such file.In /dev/ there is a frontpanel which is a link to /dev/ttyS0Could it be, that e.g. echo something > /dev/.frontpanel.caps actually sends data (something in this case) to /dev/frontpanel ?What does .caps do then?
What does the dot mean
filenames
Filenames with a full-stop (.) as their first character have only one special attribute - they are hidden files.  Which is to say, they do not show up when using e. g. ls without additional parameters to explicitly request that all files, including hidden ones, be shown (e. g. ls -a).  This is why the CWD (.) and its parent (..) do not show up by default.