Working with the Unix OS

Unix Administration
/etc/printcap is a table similar to termcap
"lpc"
is used to start and stop the printer
/usr/spool/lpd is the spool directory
"lpq"
to examine print queue
"lprm"
remove print requests
! SYSTEM V printing
# become lp administrator
su lp
# shutdown printer scheduler
/usr/lib/lpshut
# create a new laser printer on serial port 00
/usr/lib/lpadmin -plaser
-v/dev/term/00 -mhplaser
# copies the model hplaser from /usr/spool/lp/model and
renames it
# /usr/spool/lp/interface/laser, this is a script file which you
should edit
# set default print request to the epson printer
usr/lib/lpadmin -depson
# start line printer scheduler
/usr/lib/lpsched
# allow request for laser printer to be spooled
/usr/lib/accept laser
# test printer
lp -dlaser filename (laser -1)
# if you protect your directory use
lp -dlaser < filename
# status of print queue
lpstat -t
# paper jam
disable –r"paper jammed" epson
# printer broken
/usr/lib/reject -r"laser printer
gone for repairs" laser
# redirect existing spooled requests
lpmove laser-562 draft
# remove print request
cancel laser-562
# enable printer to process spool
enable laser
! Testing devices
cat /etc/motd > /dev/lp
stty < /dev/tty0l
stty 9600 < /dev/tty0l
ln /dev/tty0l /dev/epson
# display settings
# change settings
lpstart
#!/bin/sh
# lpstart - opposite lpshut
# e.g. /bin/su lp -c "/usr/local/etc/lpstart" &
until [ "$status" = "scheduler is running" ]
do
/usr/lib/lpshut > /dev/null 2>&1
while true
do
line='ps -e | grep lpsched | grep –v grep | head -1'
if [ "$line" ]; then
kill -9 'echo $line | cut -cl-6'
else
break
fi
done
rm /usr/spool/lp/SCHEDLOCK > /dev/null 2>&1
/usr/lib/lpsched
line='ps -e | grep lpsched | grep -v grep'
if [ "$line" ]; then
status='lpstate -r'
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