Ubuntu Tips and Tricks

How to Remove Old Linux Kernels

2016-05-08T19:52:00.001+08:00

Sometimes /boot is so limited, and tend to forget to do housekeeping. Here goes

dpkg --list | grep linux-image |awk {'print $2'}|grep -v "`uname -r`\|linux-image-generic"|xargs apt-get purge -y

Disable touchpad for laptop

2014-03-26T10:30:00.001+08:00

I got problem with my touchpad.. it let the cursor jumping here and there .. so it's very annoying.

Here is the tips that I found out from the Internet

xinput list | perl -ne 'if ($_ =~ /Synaptics/) {exec "xinput","set-prop",substr($_,3+index($_,"id="),2),"Device Enabled","0"}'

You may change /Synaptics/ with any value that pointed to your device from "xinput list" command

Move windows control (min, max, close) button to the right

2014-03-26T10:27:00.001+08:00

Worked from 12.04 - 13.10 (the original author said this, I tested on 13.10 and worked)

gsettings set org.gnome.desktop.wm.preferences button-layout ':minimize,maximize,close'

Borked with Error during Make Menuconfig in Kernel Compile?

2013-12-21T14:59:00.001+08:00

Just

sudo apt-get install lib32ncurses5-dev
And it'll insya Allah, works!
source

Touchpad Tidak Berfungsi Selepas Upgrade 12.04LTS

2013-12-11T07:33:00.000+08:00

Saya mengalami masalah untuk menggunakan touchpad selepas proses kemaskini pakej dalam Ubuntu 12.04 LTS saya

Berikut adalah arahan yang saya guna sebagai "root"

# modprobe -r psmouse
# modprobe psmouse proto=imps

Dan ianya berfungsi seperti sediakala.

sumber

Modifying an erroneous visudo file and cannot get into sudo

2013-11-15T11:07:00.001+08:00

I recently modified the visudo file and turns out I can't get into visudo mode at all. Worst is that in Ubuntu 12.04 we can't use "su" command or log in as "root"

Here is the tips, from here

Use pkexec command,

Just type "pkexec visudo"

And modify or restore back to the original settings.

Disable auto mount from USB device

2013-11-14T20:13:00.000+08:00

I have a problem with my Galaxy Nexus before and now my LG Nexus 4 - they keep pop up the nautilus if I insert the plug to the cable (I prefer charging my phone to the laptop).

So here is the solution, which finally I found from here

Go to your terminal, type dconf-editor. The find "org.gnome.desktop.media-handling.automount-open"

And choose your preferred choice, mine is like this:

As I prefer the phone being automounted, I just feel annoyed with the nautilus pop up, hence I untick "automount-open" but choose "automount" and "autorun-never" instead.

I feel the autorun function is so Windowish.. and wondering why it ever exists. Not that it is bad.. but for me it is less preferred.

Changing Maximize, Minimize and Close Button from Left to Right in Unity

2013-03-27T10:48:00.003+08:00

I am currently back to Ubuntu 12.04 due to stability issue with 12.10

But the problem is with the buttons. So here goes

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

This will set these buttons to right pane of your windows :)

simplified from here

Customizing Workspace Navigation Shortcuts Using Gsettings

2013-03-15T10:17:00.003+08:00

I got a problem in my Ubuntu 12.04 LTS, since the configuration that I saved using the gnome-setting interface did not worked (as if it was never saved).

So I decided to google around and found this tips which I already customized to my enviroment:

gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-1 "[\"Q\"]"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-2 "[\"W\"]"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-3 "[\"E\"]"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-4 "[\"R\"]"

Here, I used Alt with for workspace 1-4

Ubuntu Phone

2013-01-03T10:33:00.002+08:00

Mark Shuttleworth recently presented the release of Ubuntu phone. Hope to see this in Malaysia soon!

source

Finding fastest mirror on Quantal

2012-11-20T12:24:00.002+08:00

Put these lines inside your /etc/apt/source.list

deb mirror://mirrors.ubuntu.com/mirrors.txt quantal main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt quantal-updates main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt quantal-backports main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt quantal-security main restricted universe multiverse

MATE desktop environment untuk Ubuntu 12.10 Quantal

2012-11-11T22:21:00.003+08:00

Cinnamon telah diulas di sini

Untuk MATE, pilih salah satu mirror;

sudo add-apt-repository "deb http://packages.mate-desktop.org/repo/ubuntu quantal main"

ATAU

sudo add-apt-repository "deb http://repo.mate-desktop.org/ubuntu quantal main"

Kemudian;

sudo apt-get update
sudo apt-get install mate-archive-keyring
sudo apt-get update
# ini akan pasang pakej asas
sudo apt-get install mate-core
# ini akan pasang pakej lanjutan
sudo apt-get install mate-desktop-environment

sumber

Cinnamon untuk Ubuntu 12.10 Quantal

2012-11-11T10:10:00.004+08:00

Bagi pengguna Cinnamon seperti saya (yang biasa menggunakan environment ini di dalam Linux Mint), tentunya menginginkan kosmetik yang sama di dalam Ubuntu 12.10

Ia boleh diperolehi dari laman PPA di sini

Secara ringkas:

sudo add-apt-repository ppa:gwendal-lebihan-dev/cinnamon-stable 
sudo apt-get update
sudo apt-get install cinnamon

Pasang kernel terkini dari PPA

2012-10-31T23:22:00.002+08:00

Kernel terkini memang mengujakan, selain dari "bragging right" untuk ada kernel terbaru, ia juga berguna untuk menguji ciri-ciri terbaru pada kernel yang ada di dalam git.

Selain dari kompil sendiri dari git, kita boleh pasang kernel terbaru dari PPA di sini.

Option linux-image-extra, menurut komen di sini adalah untuk kernel yang mengandungi driver-driver seperti untuk KVM dan Virtualbox.

Selamat mencuba!

Grabbing fastest mirror on Ubuntu

2012-10-29T09:49:00.001+08:00

Netselect is not included by default, need to use Debian stable's netselect

1- Get it here, no dependency.

2- Find the fastest mirror:

netselect -v -s10 -t20 `wget -q -O- https://launchpad.net/ubuntu/+archivemirrors | grep -P -B8 "statusUP|statusSIX" | grep -o -P "(f|ht)tp.*\"" | tr '"\n' ' '`

3- Alter your sources.list and DONE!

Ubuntu 12.10 dilancarkan

2012-10-20T20:06:00.001+08:00

Ubuntu 12.10 telah dilancarkan. Antara pembaharuan yang dibawa ialah fungsi Amazon search di dalam versi kali ini. Untuk membuang fungsi carian tersebut anda boleh rujuk blog ini

Pendek kata guna arahan:

sudo apt-get remove unity-lens-shopping

Buang kernel lama selepas upgrade

2012-09-18T15:52:00.001+08:00

Run ni dulu:

 dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d'

Bila dah yakin, baru run:

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d;s/^[^ ]* [^ ]* $[^ ]*$.*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

Pastikan anda faham apa yang anda lakukan, segala risiko tidak akan saya tanggung.

Sumber asal

Mount HFS+ partition sebagai read/write

2012-08-24T11:03:00.002+08:00

Secara default jika kita mount partition Mac yang menggunakan filesystem HFS+, ia hanya akan beri permission "read only"

Perbincangan secara mendalam tentang hal ini boleh dibaca di sini

VNC dari Mint(Ubuntu) ke Ubuntu

2012-08-23T22:38:00.001+08:00

mac dalam bilik, laptop dalam study room. sebab nak akses current desktop.. thinking of guna VNC. so install tightvnc. sebab malas nak config, each session created by VNC server occupy port 5901...5902.. which is not default.

akses pulak guna xtightvncviewer.. akses default port 5900. otherwise kena specify host:. solution. guna x11vnc utk create vnc session, akses guna xtightvncviewer.

mmg awesome x11vnc ni.. very lightweight.

Ping

2012-06-20T10:19:00.002+08:00

The measured tree overflows

Recovering formatted device with photorec

2012-05-23T10:09:00.001+08:00

I recently got problem with my microSD card which I used in my SGS II phone - it tells that my card is not formatted, which is odd. I then use my another device to read, and try to reformat but seems the same message appeared.

Later, I tried to read it from my Linux Mint, it does not detected at all. By using looking at /dev/ seems there's device there.. so I opt to use mkfs to format the card, it worked.

However, that card contained many pictures of my lovely daughter and my wife.

My friend, later suggested to use "photorec", which is conveniently could be installed with [check first]:

$apt-cache search photorec
testdisk - Partition scanner and disk recovery tool

It's in testdisk package

To install:

sudo apt-get install testdisk

Try to play around with the flag, you recovered file could be located as you wish:

It's brilliant. Most of my files are recovered, although it seems scattered hence you need to find your important files by yourselves.

The lazy way to download PDF from a website

2012-05-16T15:53:00.001+08:00

I usually stumbled to a website where it has many PDF (slides, research papers) and I don't want to bother to download them one by one.

So I simply use lynx with -dump option and grep:
For example:

lynx -dump http://www.utdallas.edu/~zhiqiang.lin/spring2012.html|grep -o "http://*.*.pdf" > list

So in order to download them from the "list", I use curl (or you can use wget too)

for i in `cat list`;do echo $i;curl -C - $i -O;done

Done, easy eh?

Compiling Linux Kernel for Ubuntu

2012-05-15T10:38:00.001+08:00

Sometimes I felt like I wanted to have a feeling of the new kernel, well my opinion is that Ubuntu and its derivatives aren't designed for such customizations, unless you're a developer.

The notes on kernel compilation is here . Basically for Ubuntu the way is slightly different and seems much easier since you don't have to edit the Grub configurations manually after you created the *.deb file for linux images and headers. Everything will be taken care for you.

My system is now, running Linux Mint 12 [derived from Ubuntu 11.10]

vostro-mint source # uname -a
Linux vostro-mint 3.4.0-1-i5 #3 SMP Tue May 15 00:23:33 MYT 2012 x86_64 x86_64 x86_64 GNU/Linux

vostro-mint source # cat /etc/issue
Linux Mint 12 Lisa \n \l

vostro-mint source # cat /proc/version
Linux version 3.4.0-1-i5 (root@vostro-mint) (gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) ) #3 SMP Tue May 15 00:23:33 MYT 2012

Terminal record with ttyrec

2012-05-10T09:14:00.003+08:00

Do you know that you can record your terminal session with ttyrec?

On Ubuntu/Mint this software can simply being installed by issuing

sudo apt-get install ttyrec -y

The syntax is basically

ttyrec [filename]

And your session will be recorded until you issue "exit" command

To replay the session simply use

ttyplay [filename] 

Enjoy!

ipraytime, prayer time tool for Muslims

2012-05-09T09:41:00.001+08:00

When it comes to prayer times, I usually checked for JAKIM's e-solat page, here . As it's the only trusted source for prayer times in Malaysia, it could have been hit by massive simultaneous access when it comes to the early of the month, because some applications simply grab the data from that website to feed their apps.

I rarely use ipraytime, but it does have features that I believe as accurate it could be. Ipraytime is included in Ubuntu/Mint, within itools package. Hence you can simply install by

sudo aptitude install itools -y 

or sudo apt-get install itools -y

The usage is fairly straight forward

You can get your current position by using latitude marker in google map, or your own smartphone.

Let say your position:3.14004,101.74932

ipraytime -lat 3.14004 -lon 101.74932 -a 1 -m

For Malaysia, usually the angle method is Egyptian General Authority of Survey so the -a flag is meant for that. -m is for monthly schedule.

Or you can simply put your favorite location in your $HOME/.iprayrc with the following format:

City: Ampang,Malaysia
Latitude: 3.13998
Longitude: 101.74940
AngleMethod: 1
UTC: 8

Hence when you invoke

ipraytime -m

Later on or just ipraytime it will show the position that you have specified.

As for the output, some terminals do have problem with showing special characters. But it worked on old school terminals such as xterm and the minimalist mrxvt