Floppy drives are block devices with major number 2.
Typically they
are owned by
-.I root.floppy
+root:floppy
(i.e., user root, group floppy) and have
either mode 0660 (access checking via group membership) or mode 0666
(everybody has access).
Typically
.I /dev/initrd
is owned by
-.I root.disk
+root:disk
with mode 0400 (read access by root only).
If the Linux system does not have
.I /dev/initrd
The file
.I /dev/ptmx
is a character file with major number 5 and
-minor number 2, usually of mode 0666 and owner.group of root.root.
+minor number 2, usually with mode 0666 and ownership root:root.
It is used to create a pseudoterminal master and slave pair.
.PP
When a process opens
The file
.I /dev/tty
is a character file with major number 5 and
-minor number 0, usually of mode 0666 and owner.group root.tty.
+minor number 0, usually with mode 0666 and ownership root:tty.
It is a synonym for the controlling terminal of a process, if any.
.PP
In addition to the
.SH DESCRIPTION
.I /dev/vcs0
is a character device with major number 7 and minor number
-0, usually of mode 0644 and owner root.tty.
+0, usually with mode 0644 and ownership root:tty.
It refers to the memory of the currently
displayed virtual console terminal.
.PP
.I /dev/vcs[1\-63]
are character devices for virtual console
terminals, they have major number 7 and minor number 1 to 63, usually
-mode 0644 and owner root.tty.
+mode 0644 and ownership root:tty.
.IR /dev/vcsa[0\-63]
are the same, but
using