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>4. Checking for PPP Support</H1
><P
>Although PPP support is provided in almost all Linux distributions but it is still
better to check whether it is present on your system. You can use <B
CLASS="command"
>checkconfig</B
> or, better
still, look into the <TT
CLASS="filename"
>/usr/sbin</TT
> directory and locate PPP binaries with the command</P
><P
><B
CLASS="command"
>ls <TT
CLASS="option"
>-al</TT
> <TT
CLASS="parameter"
><I
>ppp*</I
></TT
></B
> </P
><P
>If you get a listing like this:</P
><TABLE
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WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="screen"
>&#13;-rwxr-xr-x 1 root root 3438 2005-05-28 14:56 ppp-go*
-rwxr-xr-x 1 root bin 1787 2004-02-26 21:36 ppp-off*
lrwxrwxrwx 1 root root 6 2005-05-28 14:17 ppp-on -&#62; ppp-go*
lrwxrwxrwx 1 root root 7 2005-05-28 14:17 ppp-stop -&#62; ppp-off*
-rwxr-xr-x 1 root bin 346812 2004-02-26 21:36 pppd*
-rwxr-xr-x 1 root bin 37916 2004-02-26 21:36 pppdump*
-rwxr-xr-x 1 root bin 25936 2003-03-02 22:05 pppoe*
-rwxr-xr-x 1 root bin 22308 2003-03-02 22:05 pppoe-relay*
-rwxr-xr-x 1 root bin 35084 2003-03-02 22:05 pppoe-server*
-rwxr-xr-x 1 root bin 12028 2003-03-02 22:05 pppoe-sniff*
-rwxr-xr-x 1 root bin 58527 2004-02-26 21:36 pppsetup*
-rwxr-xr-x 1 root bin 9192 2004-02-26 21:36 pppstats*
</PRE
></FONT
></TD
></TR
></TABLE
><P
>then PPP support is definitely present.</P
><P
>Similarly, look into <TT
CLASS="filename"
>/etc/ppp</TT
> directory, which contains the PPP options file
and some other files configuring PPP:
</P
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><PRE
CLASS="screen"
>&#13;-rw------- 1 root root 78 2004-02-26 21:36 chap-secrets
-rw------- 1 root root 1625 2005-05-28 14:35 connect-errors
-rw-r--r-- 1 root root 938 2003-03-02 22:04 firewall-masq
-rw-r--r-- 1 root root 836 2003-03-02 22:04 firewall-standalone
-rwxr-xr-x 1 root root 1208 2005-05-28 14:56 ip-down*
-rwxr-xr-x 1 root root 1208 2005-05-28 14:29 ip-down.OLD*
-rwxr-xr-x 1 root root 1945 2005-05-28 14:56 ip-up*
-rwxr-xr-x 1 root root 1945 2005-05-28 14:29 ip-up.OLD*
-rw------- 1 root root 541 2005-05-28 14:58 options
-rw------- 1 root root 656 2005-05-28 14:56 options.demand
-rw-r--r-- 1 root root 9975 2005-05-28 11:21 options.old
-rw------- 1 root root 216 2005-05-28 14:56 pap-secrets
drwxr-xr-x 2 root root 4096 2003-03-02 22:05 plugins/
-rw-r--r-- 1 root root 104 2003-03-02 22:04 pppoe-server-options
-rw-r--r-- 1 root root 4562 2003-03-02 22:04 pppoe.conf
-rw------- 1 root root 129 2005-05-28 15:12 pppscript
-rw------- 1 root root 8941 2005-05-28 14:56 pppsetup.txt
</PRE
></FONT
></TD
></TR
></TABLE
><P
>For the sake of safety do copy your original options file to a file <TT
CLASS="filename"
>options.old</TT
>
so that you can revert back to your original setup should you have troubles.</P
><P
>See <A
HREF="http://www.tldp.org/HOWTO/PPP-HOWTO/kernel-configuration.html"
TARGET="_top"
>the PPP HOWTO Chapter 10</A
> for more information on PPP support in the Linux kernel.</P
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