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Chapter 3: Linux Commands
This is the Title of the Book, eMatter Edition
Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.
init script
Run specified command or shell script to initialize the serial
line.
lock
Allow only pppd to access the device.
mru bytes
Refuse packets of more than bytes bytes.
mtu bytes
Do not send packets of more than bytes bytes.
passive, -p
Do not exit if peer does not respond to attempts to initiate a
connection. Instead, wait for a valid packet from the peer.
silent
Send no packets until after receiving one.
Files
/var/run/pppn.pid
pppd’s process ID. The n in pppn.pid is the number of the PPP
interface unit corresponding to this pppd process.
/etc/ppp/ip-up
Binary or script to be executed when the PPP link becomes
active.
/etc/ppp/ip-down
Binary or script to be executed when the PPP link goes down.
/etc/ppp/pap-secrets
Contains usernames, passwords, and IP addresses for use in
PAP authentication.
/etc/ppp/options
System defaults. Options in this file are set before the
command-line options.
~/.ppprc
The user’s default options. These are read before command-
line options but after the system defaults.
/etc/ppp/options.ttyname
Name of the default serial port.
pr
pr [options] [files]
Convert a text file or files to a paginated or columned version, with
headers, suitable for printing. If - is provided as the filename, read
from standard input.
Options
+beg_pag[:end-pag], --pages ...