The following are tips for getting the host to connect over the modem to another computer. This is appropriate for establishing a terminal session with a remote host.
This kind of connection can be helpful to get a file on the Internet if there are problems using PPP. If PPP is not working, use the terminal session to FTP the needed file. Then use zmodem to transfer it to the machine.
A generic Hayes dialer is built into
tip. Use at=hayes in
/etc/remote.
The Hayes driver is not smart enough to recognize some of
the advanced features of newer modems messages like
BUSY, NO DIALTONE, or
CONNECT 115200. Turn those messages off
when using tip with
ATX0&W.
The dial timeout for tip is 60
seconds. The modem should use something less, or else
tip will think there is a communication
problem. Try ATS7=45&W.
Create a “direct” entry in
/etc/remote. For example, if the modem
is hooked up to the first serial port,
/dev/cuau0, use the following
line:
cuau0:dv=/dev/cuau0:br#19200:pa=noneUse the highest bps rate the modem
supports in the br capability. Then, type
tip cuau0 to connect to the modem.
Or, use cu as root with the following
command:
# cu -lline -sspeedline is the serial port, such
as /dev/cuau0, and
speed is the speed, such as
57600. When finished entering the AT
commands, type ~. to exit.
The @ sign in the phone number
capability tells tip to look in
/etc/phones for a phone number. But, the
@ sign is also a special character in
capability files like /etc/remote, so it
needs to be escaped with a backslash:
pn=\@Put a “generic” entry in
/etc/remote. For example:
tip115200|Dial any phone number at 115200 bps:\
:dv=/dev/cuau0:br#115200:at=hayes:pa=none:du:
tip57600|Dial any phone number at 57600 bps:\
:dv=/dev/cuau0:br#57600:at=hayes:pa=none:du:This should now work:
# tip -115200 5551234Users who prefer cu over
tip, can use a generic
cu entry:
cu115200|Use cu to dial any number at 115200bps:\
:dv=/dev/cuau1:br#57600:at=hayes:pa=none:du:and type:
# cu 5551234 -s 115200Put in an entry for tip1200 or
cu1200, but go ahead and use whatever
bps rate is appropriate with the
br capability.
tip thinks a good default is 1200 bps
which is why it looks for a tip1200 entry.
1200 bps does not have to be used, though.
Rather than waiting until connected and typing
CONNECT
each time, use hosttip's cm
capability. For example, these entries in
/etc/remote will let you type
tip pain or tip muffin
to connect to the hosts pain or
muffin, and tip
deep13 to connect to the terminal server.
pain|pain.deep13.com|Forrester's machine:\
:cm=CONNECT pain\n:tc=deep13:
muffin|muffin.deep13.com|Frank's machine:\
:cm=CONNECT muffin\n:tc=deep13:
deep13:Gizmonics Institute terminal server:\
:dv=/dev/cuau2:br#38400:at=hayes:du:pa=none:pn=5551234:This is often a problem where a university has several modem lines and several thousand students trying to use them.
Make an entry in /etc/remote and use
@ for the pn
capability:
big-university:\
:pn=\@:tc=dialout
dialout:\
:dv=/dev/cuau3:br#9600:at=courier:du:pa=none:Then, list the phone numbers in
/etc/phones:
big-university 5551111
big-university 5551112
big-university 5551113
big-university 5551114tip will try each number in the listed
order, then give up. To keep retrying, run
tip in a while
loop.
Ctrl+P is the default “force” character,
used to tell tip that the next character is
literal data. The force character can be set to any other
character with the ~s escape, which means
“set a variable.”
Type
~sforce=
followed by a newline. single-charsingle-char
is any single character. If
single-char is left out, then the
force character is the null character, which is accessed by
typing
Ctrl+2
or Ctrl+Space. A pretty good value for
single-char is
Shift+Ctrl+6, which is only used on some terminal
servers.
To change the force character, specify the following in
~/.tiprc:
force=single-charThis happens when
Ctrl+A is pressed, which is tip's
“raise character”, specially designed for people
with broken caps-lock keys. Use ~s to set
raisechar to something reasonable. It can
be set to be the same as the force character, if neither
feature is used.
Here is a sample ~/.tiprc for
Emacs users who need to type
Ctrl+2 and Ctrl+A:
force=^^
raisechar=^^The ^^ is
Shift+Ctrl+6.
When talking to another UNIX®-like operating system,
files can be sent and received using ~p
(put) and ~t (take). These commands run
cat and echo on the
remote system to accept and send files. The syntax is:
~p local-file [remote-file]
~t remote-file [local-file]
There is no error checking, so another protocol, like zmodem, should probably be used.
本文及其他文件,可由此下載: ftp://ftp.FreeBSD.org/pub/FreeBSD/doc/。
若有 FreeBSD 方面疑問,請先閱讀
FreeBSD 相關文件,如不能解決的話,再洽詢
<questions@FreeBSD.org>。
關於本文件的問題,請洽詢
<doc@FreeBSD.org>。