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Manual Pages  — FBTAB


fbtab – change device protection upon login



The fbtab file contains a number of lines specifying a device together with a list of devices with associated protections. Comments start with a ‘#’ and extend to the end of the line.

Blank lines or lines with only a comment are ignored.

All other lines consist of three fields delimited by whitespace: a login device ( /dev/ttyv0), an octal permission number (0600), and a colon (‘:’) delimited list of device patterns ( /dev/console, /dev/dsp*). All device patterns are absolute paths.

If the tty argument (relative path) matches a login device name (absolute path), the permissions of the devices in the colon-delimited list are set as specified in the second field, and their ownership is changed to that of the UID and GID arguments.


  The fbtab file resides in /etc.


login(1), getty(8)


Guido van Rooij

FBTAB (5) August 22, 1994

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Please direct any comments about this manual page service to Ben Bullock.

"I liken starting one's computing career with Unix, say as an undergraduate, to being born in East Africa. It is intolerably hot, your body is covered with lice and flies, you are malnourished and you suffer from numerous curable diseases. But, as far as young East Africans can tell, this is simply the natural condition and they live within it. By the time they find out differently, it is too late. They already think that the writing of shell scripts is a natural act."
— Ken Pier, Xerox PARC