Dell EMC PowerEdge VRTX User Manual page 142

# xdm is now a separate service
x:5:respawn:/etc/X11/prefdm -nodaemon
Edit the /etc/securettyfile as follows:
Add a new line, with the name of the serial tty for COM2:
ttyS1
The following example shows a sample file with the new line.
vc/1
vc/2
vc/3
vc/4
vc/5
vc/6
vc/7
vc/8
vc/9
vc/10
vc/11
tty1
tty2
tty3
tty4
tty5
tty6
tty7
tty8
tty9
tty10
tty11
ttyS1
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