Behold the power of the terminal!
List PCI devices / wifi network relevant portion only
$ lspci -v | grep -iA 7 network
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak]
Subsystem: Intel Corporation Centrino Wireless-N 1000 BGN
Flags: bus master, fast devsel, latency 0, IRQ 43
Memory at f0500000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Look for correctly loading modules
$ lsmod | grep <your module>
In this case, the module is
Show kernel messages related to your module
$ dmesg | grep <your module>
List hardware config for your network
$ sudo lshw -c network
Show and/or configure network interface(s)
Show and/or configure wireless interface(s)
Scan your network
$ iwlist scan
Show switches for your wifi device
$ rfkill list all
If you want more detailed info/debug options you can run
man <command> for each of them.
If you have wireless problems, post the output of these commands and we'll help you. Not all of them are necessary, but the more info the better.
For log files, check out the
/var/log/ directory. The
xorg.0.log files are generally the most useful ones, at least in my experience. For wifi stuff
dmesg will do.