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iperf - tool for testing network transfer speeds

Sat, 03/05/2011 - 23:10 — sham

http://iperf.sourceforge.net/

iperf is a tool for testing network transfer speeds. From its sourceforge page:

'Iperf was developed by NLANR/DAST as a modern alternative for measuring maximum TCP and UDP bandwidth performance. Iperf allows the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.'

Quick start:

iperf -s on server
iperf -c hostname (or ip of server) on client. Use -f to change the format.

CLI Tip: Quickly create backup of file

Wed, 03/02/2011 - 21:50 — sham
Quick tip to rename a file: 
cp /etc/X11/xorg.conf{,.bak}
will create a copy of xorg.conf as xorg.conf.bak in /etc/X11

High X server cpu usage on Ubuntu 10.10?

Mon, 11/29/2010 - 00:03 — sham

I was having very slow firefox scrolling and terminal text- I fixed it by updating to 260.19.21 from https://launchpad.net/~ubuntu-x-swat/+archive/x-updates

System: Ubuntu 10.10 x64 with 3 monitors on 2 Nvidia cards using Xinerama

Official Spotify for Linux Native Client with Offline track support

Sat, 10/30/2010 - 10:59 — sham

I have been having problems with Spotify under wine on Ubuntu 10.10. A bit of googling revealed that Spotify now have a preview of a native client for Linux!

http://www.spotify.com/uk/download/previews/

Just installed it and it seems to be working well.

Linux/Ubuntu: Changing your default shell

Wed, 10/13/2010 - 20:31 — sham
Use the command: 
chsh -s /path/to/shell yourusername

So to switch to zsh use 
chsh -s /bin/zsh yourusername

Ubuntu One Music not syncing (Queued)

Wed, 06/09/2010 - 23:05 — sham
I just bought an album from the Ubuntu One album store. It was very quick and easy to buy but as with many things, once you have handed over the money it got alot worse. Basically the music was 'in my cloud' but it wouldn't sync to my local machine...
Ubuntu has status page
Which linked to a bug report
Which said to open Applicaitons->Accessories->Terminal and run: 
 touch ~/.ubuntuone/Purchased\ from\ Ubuntu\ One/placeholder; u1sdtool -q; u1sdtool -c
This will put a "placeholder" file in your ~/.ubuntuone/Purchased from Ubuntu One/ folder and then force the syncdaemon to reconnect and try to sync that folder.

Virtualbox 3.1 and Ubuntu Karmic greyed out USB problem

Sun, 01/24/2010 - 14:29 — sham

 Fix found here: http://ubuntuforums.org/showthread.php?t=1381318

Basically I wasn't in the vboxusers group:

1) Check if your username is in the group: 

cat /etc/group | grep v*box

2) If it isn't add it and logout/login.

sudo usermod -G vboxusers -a YOURUSERNAME

Eclipse 1.5 Galileo / Aptana / PDT install problem

Wed, 01/13/2010 - 17:45 — sham

Problem installing PDT on Eclipse/Aptana on Ubuntu 9.10?

You need to add the galileo update site first:

1) Help > Install new software > Add

2) "Galileo Update Site" : http://download.eclipse.org/releases/galileo

3) Go back to plugin manager and try again

Linux Blogging client that supports multiple categories (tags!)

Sun, 01/03/2010 - 15:21 — sham

The best linux blogging client that I have found (just now) is called bilbo blogilo (they recently had to change their name).

Website: http://blogilo.gnufolks.org/

To install in Ubuntu Karmic: sudo apt-get install bilbo

 

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