Internet |
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Network problems with xDSL |
If e.g. your VNC sessions always close for "no reason", or you have problems
with certain web sites - your network card setup can be the reason. They are
setup for Ethernet, allowing a MTU (maximum transmission unit) of 1500 bytes.
But when using xDSL with PPPoE, there is an additional overhead of 8 bytes, so
you need to decrease the MTU. In *nix, this is done with |
root@machine # ifconfig eth0 mtu 1492 |
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You may want to put this line to your /etc/init.d/boot.local file
to not enter it manually after each reboot. |
For more detailed information, see the
MTU-Mini-FAQ (German). On that site there is even a
more
detailed FAQ on DSL topics available (also German). |
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| Include link to the PHP documentation on errors |
When an error occurs while executing a PHP script, the processing is often
canceled and an error message displayed. For programmers it can be very
helpful, if this message contains a link to the documentation of the PHP
command that caused the error, to look up the syntax. This can easily be
achieved following these steps:
- Download the PHP manual (the "Many HTML files" variant) from
php.net
- Unpack the archive, e.g. to
/usr/share/doc/phpmanual and
make this directory readable for your webserver
- In your Apache configuration, add an appropriate alias. In our example,
this would be done by the directive
Alias /phpmanual/ /usr/share/doc/phpmanual/
- In your
/etc/php.ini , enable the docref_root
directive as follows: docref_root = "/phpmanual/"
- Restart the Apache webserver:
/etc/init.d/apache2 graceful
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