Varun's Blog

Samba

varun — Sun, 26 Sep 2010 03:50:07 +0000

Good article on setting up samba on ubuntu.

Turn off display in Linux without X

varun — Wed, 15 Sep 2010 17:39:58 +0000

If you’re using your laptop as a server without running X, here’s a command to turn on/off the display from CLI:
# vbetool dpms off
# vbetool dpms on

Cisco 7971 IP Phone as a SIP device on asterisk

varun — Mon, 13 Sep 2010 05:57:00 +0000

Good articles on the topic:

Remove backup schedules from trixbox

varun — Mon, 13 Sep 2010 05:09:36 +0000

# mysql -u asteriskuser -p amp109
mysql> connect asterisk;
mysql> delete from backup_schedule;

AWLL7025 Dual-Band Wireless-N USB in Ubuntu

varun — Sun, 12 Sep 2010 07:50:20 +0000

I recently decided to move my old PC in the garage and run my web sites from there. One big problem though – no cat 5 in the garage. So, I thought lets get a cheap wireless-n USB adapter and I should be good. I purchased an AWLL7025 from amazon for $18. While the adapter worked great on a Windows 7 machine with the Vista drivers supplied by airlink, getting it to work on my linux machine running Ubuntu 10.0.4 wasn’t such a breeze. Here’s what I did to get it to work:

1. $lsusb in Ubuntu (device was not recognized, no driver loaded):

Bus 001 Device 002: ID 15a9:0012

2. Found out from the windows driver files that this device has a Ralink chipset rt2870.

3. Downloaded the Ralink rt2870 linux driver sources from their website and followed the instructions to compile the driver:

http://www.ralinktech.com/support.php?s=2

4. The one extra step that wasn’t in the readme was to add the device id (15a9:0012 from the lsusb output) in the appropriate source file before compiling the driver:

rtusb_dev_id.c: {USB_DEVICE(0x15A9,0×0012)}, /* Airlink AWLL7025 */

5. Loaded the compiled driver as per the instructions in the readme and I finally had a decent net connection (wireless-n speeds) from the PC in my garage!

Trixbox: Trying the G729 Codec

varun — Thu, 29 Jul 2010 17:37:41 +0000

So far the new G729 codec that I downloaded from http://asterisk.hosting.lv seems to be working great. Using SIP from the iPhone over the 3G network definitely benefits from this low bandwidth codec.

How to setup a remote SIP extension

varun — Tue, 27 Apr 2010 17:44:41 +0000

A good post on the subject of setting up a remote sip extension. This allows me to have SIP extensions over a WAN tunneling in through the my firewall.

A Good Primer on apt-get and dpkg

varun — Sun, 25 Apr 2010 02:10:51 +0000

Came across a good primer on using apt-get.

From 30,000 feet above

varun — Mon, 30 Nov 2009 07:35:57 +0000

Technology has definitely come a long way. I’m writing this post on board Delta flight DL-2106 from San Jose to Atlanta using an in-flight wifi service called gogowifi. Getting a fairly decent speed as well. It’s a red eye, so … Continue reading →

After a hard day’s work (long walk)

varun — Thu, 27 Aug 2009 22:42:16 +0000