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25.1 SunOS 4.1.X
25.1.3 Line Printer Daemon, lpd
The line printer daemon, lpd, is started up in /etc/rc and creates a lock file, /var/spool/lpd.lock, to prevent two copies of the daemon from running simultaneously.
The relevant lines in /etc/rc will be similar to:
if [ -f /usr/lib/lpd ]; then
rm -f /dev/printer /var/spool/lpd.lock
/usr/lib/lpd; (echo -n ' printer') >/dev/console
fi
lpd reads the /etc/printcap file to learn about existing printers and accepts print requests from users.
Unix System Administration - 8 AUG 1996
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