Debian activate dma

To create a connection, go to Edit a connection. Now select your connection method. I am going for Ethernet as I have a wired connection. Now type in a Profile name. It can be anything you want. I recommend you make it short and easy. Now type in a Device identified. The image below shows the default output when enabling an interface. It is possible to add further action in case an interface is activated or deactivated.

These scripts are called if-pre-up and if-post-down scripts and come into play before enabling and after disabling an interface.

The next example demonstrates this in combination with a firewall that is active in case the interface is active, too. For more information regarding additional options you may have a look at the resources given below. The author would like to thank Axel Beckert for his help and critical comments while preparing this article.

Co-author of the Debian Package Management Book available from dpmb. Juniper switches use the RSTP costs and therefore this may lead to different spanning tree calculations and loop problems. This can be fixed by settings the costs manually, either on the switch or on the server. Bridging without Switching By default the Linux bridge acts like a switch. This means, it remembers the MAC addresses behind a switch port and if the destination MAC address is known, data packets or only forward to the respective port - otherwise packets will be broadcasted.

In some setups this is bad. For example if the bridge connects 2 trunk interfaces and the same MAC addresses may be seen from both interfaces, depending on the VLAN. YYY, then there is no need to specify the vlan-raw-device, as the raw device can be retrieved from the interface name. Eg: auto eth0. Just config the bridge, and the VLAN interface will be created automatically when creating the bridge, e.

Attaching the physical interface eth0 to a bridge eg. Kernel newer than 2. This is done using a post-up line in the bonding interface configuration. This is useful when more than one server is to be visible via the Internet. Note that virtual hosts can support multiple Apache servers with a single IP address. Apache responds to the domain name supplied by the client in the HTTP header.

In many other situations, one external IP is needed for each server using a port. The above configuration is the previous traditional method that reflects the traditional use of ifconfig to configure network devices.

Those types of virtual interfaces have names of the form interface:integer and ifconfig treats them very similarly to real interfaces. Nowadays ifupdown uses the ip utility from the iproute2 package instead of ifconfig.

The newer ip utility does not use the same concept of aliases or virtual interfaces. However, it supports assigning arbitrary names to the interfaces they're called labels. The key difference from the method described above is that all such sections are treated by ifupdown as just one interface, so user can't add or remove them individually.

Note however that this method is dangerous! A similar warning from another person exists in the history of this page. Wiki Login. Network setup. NetworkConfiguration last modified Debian privacy policy , Wiki team , bugs and config. Sometimes, especially with older drives, the installer may fail to boot from an optical disc. The installer may also — even after booting successfully from such disc — fail to recognize the disc or return errors while reading from it during the installation.

There are many different possible causes for these problems. We can only list some common issues and provide general suggestions on how to deal with them.

The rest is up to you. If the installer fails to recognize the disc, try just running the option Detect and mount installation media a second time.

If this does not work, then try the suggestions in the subsections below. If you cannot get the installation working from optical disc, try one of the other installation methods that are available. If you downloaded an iso image, check that the md5sum of that image matches the one listed for the image in the MD5SUMS file that should be present in the same location as where you downloaded the image from.

Next, check that the md5sum of the burned disc matches as well. The following command should work. It uses the size of the image to read the correct number of bytes from the disc. If, after the installer has been booted successfully, the disc is not detected, sometimes simply trying again may solve the problem.

If you have more than one optical drive, try changing the disc to the other drive. If that does not work or if the disc is recognized but there are errors when reading from it, try the suggestions listed below. Some basic knowledge of Linux is required for this. To execute any of the commands, you should first switch to the second virtual console VT2 and activate the shell there.

After that, also check the output of dmesg.