[Ubuntu Maverick] Install packages from PPA

By Tryout |
Wednesday, January 26, 2011
Posted in | 0 意見
Personal maintained packages will update more frequently than the official release in most of the cases. For example, ibus.

Recently, I just installed ibus-pinyin in Maverick, after playing with ibus for a while, I found out that it didn't support Simplified/Traditional Chinese switching. The pinyin result always mixed up SC/TC characters and made me so hard to choose the right one.

Thanks for Google, I found something helpful. The current version in official release was 1.3.7-1ubuntu4, but the latest version of ibus in PPA is 1.3.9, and it supported the SC/TC switching since 1.3.8. Cool!

Installation steps stated bellow:

1. Go to PPA Website.
2. Search packages you would like to install, ex. ibus
3. We can found the ppa maintained by ibus author, https://launchpad.net/~shawn-p-huang/+archive/ppa
4. In the "Adding this PPA to your system" section, we can find "ppa:shawn-p-huang/ppa"
5. Open your favorite terminal
6. $sudo add-apt-repository ppa:shawn-p-huang/ppa

The script will do all the tedious things for you. (import key, install...etc)

P.S. You can find the new-added site located at "/etc/apt/sources.list.d/"

[Ubuntu Maverick] Reset Gnome top panel to default

By Tryout |
Tuesday, January 18, 2011
Posted in | 0 意見
$gconftool --recursive-unset /apps/panel && killall gnome-panel

[Ubuntu Maverick] Change hostname

By Tryout |
Thursday, January 13, 2011
Posted in | 0 意見
Keep a memo here in case.

1. $sudo vim /etc/hostname
2. $sudo vim /etc/hosts
3. logout&login
4. $hostname

[Ubuntu Maverick] Configure GDM Login Screen

By Tryout | Posted in | 0 意見
When you broke your login screen UI, you may try the following steps to rescure it.

  1. $sudo ln -s /usr/share/applications/gnome-appearance-properties.desktop /usr/share/gdm/autostart/LoginWindow/
  2. Logout, the GDM "Appearance Setting" will popup
  3. Select the default "Ambiance" and then press the "Customize" button, you can configure login theme/icons here.
  4. After customizing the "Appearance Setting", login
  5. $sudo unlink /usr/share/gdm/autostart/LoginWindow/gnome-appearance-properties.desktop

[Ubuntu Maverick] Enable Wireshark capturing for non-root user

By Tryout |
Monday, January 10, 2011
Posted in | 3 意見
When you tried to launch the wireshark capturing, you may encounter a problem: there's no network interfaces available for capturing. This is because the executable(/usr/bin/dumpcap) which is doing the indeed capturing job needs permission of root. Fortunately, I found the solution at wireshark wiki:CapturePrivileges, and I did some modification due to security concern. And I am going to keep a memo here in case someday someone may need this :-)
$sudo useradd -U -M -s /bin/false wireshark
$sudo chgrp wireshark /usr/bin/dumpcap
$sudo chmod 754 /usr/bin/dumpcap
$sudo setcap 'CAP_NET_RAW+eip CAP_NET_ADMIN+eip' /usr/bin/dumpcap
$sudo gpasswd -a [username] wireshark

logout & login, and you're done!
p.s.
[1]. useradd: -U means "Create a group with the same name as the user, and add the user to this group."
[2]. useradd: -M means "Do no create the users home directory."
[3]. useradd: -s /bin/false means "Do no give the user a login shell."
[4]. chgrp: Change the group of each FILE to GROUP.

[Ubuntu Maverick] JDK5 Installation/Setup for building Android in x64 architecture

By Tryout |
Friday, January 7, 2011
Posted in | 2 意見
Sun-JDK5 is one of those prerequisites that used to build android source successfully.
(According to official setup notes: Java 6 is not supported, because of incompatibilities with @Override.) The default JDK choose by Maverick was icedtea6, which is not recommended for building android, so, we're gonna install JDK5 instead of icedtea.

Unfortunately, JDK5 was abandoned by Ubuntu 10.10/10.04, but fortunately, Janty(9.04) still have JDK5 in its repository. So, let's move on.

Add packages sources to /etc/apt/sources.list:
deb http://archive.ubuntu.com/ubuntu dapper main multiverse
deb http://archive.ubuntu.com/ubuntu dapper-updates main multiverse
and then:
$sudo apt-get update
$sudo apt-get install sun-java5-jdk
after installation finished, use
$java -version
to check the current java version.

If you had JDK6 installed before JDK5, you probably need help from 'update-alternatives'.
First, list all Java installed,
$update-java-alternatives -l
Second, set the JDK5 as system default,
$sudo update-java-alternatives -s java-1.5.0-sun
You are ALL SET!

[Ubuntu Maverick] Get ubuntu/kernel version/code-name

By Tryout | Posted in | 0 意見
Sometimes, when you logged in a remote Ubuntu server, it will be easier to find out suitable packages if you know the version/code-name of it.
In gnome terminal, to get the Ubuntu version, use the following command:
  • $cat /etc/lsb-release
you will get some similar output as following:

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=10.10
DISTRIB_CODENAME=maverick
DISTRIB_DESCRIPTION="Ubuntu 10.10"

to get the kernel version, use the following command:
  • $uname -a
then you will get the following output:

Linux 2.6.35-generic #42-Ubuntu SMP Thu Dec 1 00:00:00 UTC 2000 x86_64 GNU/Linux
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