mbirth's Wiki

iPhoneOS vs. Android

Markus Birth — Mon, 08 Mar 2010 23:16:00 +0100

iPhoneOS vs. Android

iPhoneOS
- can change keyboard layout on the fly
- ~150.000 Apps (most are gimmicks though)
- Apple decides which apps get onto the phone/in the AppStore
- only syncs with one single iTunes, i.e. no Linux support at all, no sync at multiple places
- supports Push Notifications via Apple servers
- Tethering depends on network carrier / paid
- cheap iPhone OS updates, new versions still support (almost) all old devices

Android
- very loose controlled Market store
- ~20.000 Apps and growing
- keyboard language related to GUI language (not independently configurable!)
- syncs mostly with Google services, but custom apps available for ActiveSync, SyncML, etc.
- can install apps using adb from Android SDK, even from Linux
- Push Notifications are a bit complicated and not native (e.g. IBM MQTT)
- Tethering via different methods from free to $30
- Android updates depend on cell phone maker

Citrix ICAClient

Markus Birth — Thu, 04 Mar 2010 14:22:24 +0100

Citrix ICAClient

Download: citrix.com (preferably .deb format)

This plugin will work with browsers which support Netscape compatible plugins, e.g. Firefox or Opera.

SSL error 61

This error means your certificate chain is broken or not “trusted”.

Get certificates

While the Windows clients download the certificates automatically, the Linux client doesn't. You will need access to a Windows running Firefox or talk to someone to get the required certificates.

Open Firefox (make sure you had at least one successful connection using the ICAClient)
go to menu Tools → Options… → Advanced → Encryption and click the button View certificates
click the Servers tab
find the certificate matching your desired Citrix server and select it (click once)
now click the Export… button, choose X.509 certificate (DER) as format and save it
click the View… button and notice the name under “Issued By” → “Common Name (CN)” then close the dialog
select the Authorities tab
search the list for the name you just saw, most times the group will have a similar name
export this certificate the same way as above (DER format)
view that certificate and check whether the “Issued By” → “Common Name (CN)” is different from the certificates name - if so: repeat the steps to also export this one
if all certificates are exported, copy them to these locations:
- the Root CA certificate (that one you exported last) goes to /usr/lib/ICAClient/keystore/cacerts/ to make it a trusted certificate
- all other go to ~/.ICAClient/keystore/cacerts/
All done.

Merge Video Files

Markus Birth — Tue, 02 Mar 2010 23:59:34 +0100

Merge Video Files

To merge multiple (similar) video files into one big file, there are different ways.

avimerge

This only works with avi files. avimerge is part of the transcode-utils package.

avimerge -o output.avi -i file1.avi file2.avi file3.avi fileN.avi

If the sound doesn't match from the second file on, use the -c switch.

Check your files after merging! If you have no audio near the end of the final video file, use mencoder below.

mencoder

This should also work with mpg videos. Install the mencoder package.

mencoder -oac copy -ovc copy file1.avi file2.avi file3.avi fileN.avi -o output.avi

ACPI Events

Markus Birth — Mon, 01 Mar 2010 21:40:46 +0100

ACPI Events

If you wish to change the behavior upon pushing e.g. the power button, you can edit the config files located in /etc/acpi/events/. To disable the power button, you would edit the file powerbtn there and change the action line to:

action=/bin/true

Compiling Kismet

Markus Birth — Fri, 26 Feb 2010 00:15:54 +0100

Compiling Kismet

You need the following libraries to successfully compile Kismet:

 ./configure --enable-airpcap

Install from PPA

You can also install the latest version using aptitude from Festor's HackTools PPA.

The shown URL to the PPA is wrong as Festor's account got deactivated. The correct URLs are:

deb http://ppa.launchpad.net/festor/hack-tools/ubuntu jaunty main
deb-src http://ppa.launchpad.net/festor/hack-tools/ubuntu jaunty main