hhoegl@aspire1:~$ uname -a
Linux aspire1 2.6.32-38-generic #83-Ubuntu SMP Wed Jan 4 11:13:04 UTC 2012 i686 GNU/Linux

Version
    hhoegl@aspire1:~/socketcan$ svn info
    Path: .
    URL: svn://svn.berlios.de/socketcan/trunk
    Repository Root: svn://svn.berlios.de/socketcan
    Repository UUID: 030b6a49-0b11-0410-94ab-b0dab22257f2
    Revision: 1277
    Node Kind: directory
    Schedule: normal
    Last Changed Author: hartkopp
    Last Changed Rev: 1277
    Last Changed Date: 2011-09-30 13:40:21 +0200 (Fri, 30 Sep 2011)

http://www.kernel.org/doc/Documentation/networking/can.txt

socketcan Treiber (siehe README):
make KERNELDIR=/usr/src/linux-headers-2.6.32-38-generic

modprobe vcan
hhoegl@aspire1:~$ sudo  ip link add type vcan
hhoegl@aspire1:~$ sudo ip link set vcan type can help

hhoegl@aspire1:~$ ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 70:5a:b6:37:2b:b6 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether c4:17:fe:52:52:df brd ff:ff:ff:ff:ff:ff
7: vcan0: <NOARP> mtu 16 qdisc noop state DOWN 
    link/can