Julius Beckmann » Ubuntu

Ubuntu: Create own or fix broken samba shared directorys

Julius — Mon, 30 May 2011 10:28:39 +0000

I recently wanted to create a shared folder with the attribute hidden, but did not want to change the /etc/samba/smb.cnf.

So i searched where the shares created by the gnome folder-properties window where saved. The directory is:

/var/lib/samba/usershares/

This is also the place, where you might fix a broken share by deleting the config file.

Kubuntu: Connect to hidden WLAN

Julius — Mon, 30 May 2011 10:10:26 +0000

Somehow the Network-Manager in Kubuntu can not connect to hidden wireless lan. But i found a simple workaround in the kubuntuforums.net:

Go in the Kubuntu Network-Manager and add a new connection with all the details of the hidden WLAN.

Now open a terminal and run this command:

sudo iwlist wlan0 scan essid NameOfHiddenWLAN

This will scan on the wlan0 device for a network with the name "NameOfHiddenWLAN".
A few seconds later, your Network-Manager might already have connected to the hidden WLAN, if everything was correct.

Ubuntu: Backup/Copy network settings in Ubuntu

Julius — Mon, 02 May 2011 20:17:13 +0000

I did a clean install of Ubuntu 11.04 and copied all the needed configs from my old 10.10 installation. But i could not find the needed folders for the network and wireless settings, so i searched for them and this is what i found.

To backup or copy the network settings under ubuntu, you need 2 parts of your old system:

1. The .gconf part
You need to copy the folder where the network settings are stored, this is here:

/home/YOUR_USERNAME/.gconf/system

You can copy the whole folder and move it to the new system.

2. The Keyring
If you search for keywords or passphrases, you will not find any in .gconf/system.
The password for WLAN access are stored inside your keyring, which is stored here:

/home/YOUR_USERNAME/.gnome2/keyrings

You need this folder, if the gconf settings need a passphrase from your keyring.

Ubuntu: Install on a Disk with less than 4.4 GB (Workaround)

Julius — Sun, 01 May 2011 15:37:24 +0000

I tried to install Ubuntu 11.04 on a 4 GB USB-Stick today, but was failed by the installer who wants at least 4.4 GB free space. This is unnecessary much, because a normal Ubuntu install will stay below 2.5 GB.
I found a "fix" that works like this:

1. Start Ubuntu from CD/DVD as a Live-CD (The "Test", not the "Install" Button).

2. Open up a console / terminal and enter the following code:

gksu gedit /usr/lib/ubiquity/plugins/ubi-prepare.py

This will open a python file that includes the "min_size" method.
Search for the line (around line 310) that says:

"min_disk_size = size * 2"

Change the code to this:

"min_disk_size = size * 1.4"

Then save and close the editor.

3. Start the installer on the desktop. It should ask now for about 3 GB.

Original fix posted by Nathan.

Linux: Change timezone on Debian/Ubuntu

Julius — Wed, 27 Apr 2011 13:35:24 +0000

Change timezone on your Ubuntu/Debian system by opening a Terminal and run this command:

sudo dpkg-reconfigure tzdata

Ubuntu: Booting with "quiet" and "splash" ist faster.

Julius — Sun, 03 Apr 2011 12:13:56 +0000

I like to see what is going on when my ubuntu boots, so i disabled "splash" and "quiet" in mit "/etc/default/grub" and updated grub via "update-grub" afterwards as root.
Today i checked how this might slow down the boot process, because of the much output by the kernel. This is my result:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" --> 28 Seconds

GRUB_CMDLINE_LINUX_DEFAULT="quiet" --> 32 Seconds

GRUB_CMDLINE_LINUX_DEFAULT="splash" --> 30 Seconds

GRUB_CMDLINE_LINUX_DEFAULT=" " --> 33 Seconds

On my system, "quiet" speeds up booting by 1 or 2 seconds, and "splash" by 2 or 3 seconds.

I might leave both on for faster booting, but i will miss my informative kernel output :(

Ubuntu: Howto move min/max/close buttons to the right in Ubuntu Lynx 10.4

Julius — Sun, 04 Apr 2010 09:42:35 +0000

With version 10.4 Ubuntu design team decided to move the minimize/maximize/close buttons to the left. Maybe to look like mac. For everybody who do not like this and want their buttons back on the right, follow the instructions.

Even if the position on the left might have some advantages, here is a instruction for changing them back.

Go to the "Terminal" or "Shell" and start the Programm:

gconf-editor

Now navigate to:

apps>metacity>general

And change the key button_layout from:

maximize,minimize,close:

menu:minimize,maximize,close

Even faster is this command you need to run in your terminal/shell:

gconftool-2 --set /apps/metacity/general/button_layout --type string menu:minimize,maximize,close

How this helps.

Ubuntu: Open Windows in Foreground

Julius — Sun, 07 Feb 2010 18:47:38 +0000

If your windows do not open in Foreground like we are all used to it, it might be caused by a wrong compiz-setting.
In this article i will describe how to fix that problem.

The setting can be found in the Compiz Setting Manager. This manager can be found under "System" -> "Settings"
Under "General options/Focus & Raise Behaviour/Focus Prevention Level" is the checkbox.

On my system even without any visual effects, this setting was used.

If you cant find the Compiz Settings Manager, you need to install this package first. Simple command:

sudo apt-get install compizconfig-settings-manager

Ubuntu: Adding Thunderbird to indicator-applet

Julius — Fri, 05 Feb 2010 06:15:57 +0000

Adding Thunderbird to the "indicator-applet" is possible and not that hard.
I wrote down the few commands and hints.

Applications shown by the "indicator-applet" are listed in this directory:

/usr/share/indicators/messages/applications/

By default the files "empathy" and "evolution" should be inside this directory.

Adding Thunderbird

Adding Thunderbird is just creating a new file with the path to the .desktop file.

Opening the "thunderbird" file:

sudo gedit /usr/share/indicators/messages/applications/thunderbird

Now add this line and save:

/usr/share/applications/thunderbird.desktop

Hint: Check if that file exist on your system!

Now you should be abled to see Thunderbird if you klick on the "indicator-applet".

Removing Evolution

Removing Evolution from the "indicator-applet", just execute this command:

sudo rm /usr/share/indicators/messages/applications/evolution

Credit

Credit for this goes to "Lorenzo Francisco":
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/367175/comments/6

Sicherheit: Kritische OpenSSL Lücke in Ubuntu

Julius — Fri, 27 Jun 2008 10:43:36 +0000

Es wurde ein Sicherheitslücke im neuen Ubuntu Linux 8.04 LTS System gefunden welche durch präparierte Pakete eine Denial of Service Attacke in Programmen die gegen OpenSSL gelinkt sind verursachen kann. Es können aber auch Ruby Scripte genutzt werden um die Attacke durchzuführen. Es ist sowohl ein Denial of Service Angriff möglich, als auch das Einschleusen von Fremdcode welcher dann mit den aktuellen User Rechten ausgeführt wird.

Es wird empfohlen alle betroffenen Systeme mit der OpenSSL Schwachstelle upzudaten: Ubuntu Linux LTS 8.04 und Kubuntu, Edubuntu, and Xubuntu.

Das Updaten geht so:

apt-get update
apt-get upgrade

Damit die Änderungen auch übernommen werden ein Neustart:

sudo reboot

Quelle:
http://www.linuxsecurity.com/content/view/139127?rdf