Just some notes on useful Ubuntu tweaks
- Enable right ALT key (useful for Emacs): To set just for the current session:
setxkbmap -option altwin:meta_alt(inspired from a thread on AskUbuntu). To make permanent: run
dconf-editor, find (CTRL-F)
xkb-optionsand set it to
['altwin:meta_alt']and hit enter. From this SO comment.
- PDF highlighting: first,
sudo apt-get install qpdfview. Then
sudo emacs /etc/gnome/defaults.listand change
- Put a window from one monitor to another using keyboard shortcut.
- Remove Amazon
sudo apt-get remove unity-lens-shopping
- Get "normal" menus back in Unity (see this forum post)
- Get ctrl-alt-numpad function back for positioning windows in 12.04
- Using Emacs keybindings across the entire system
- Nautilus open terminal
- To add a folder to "Places" (kind of) open the folder in Nautilus and hit CTRL+D to bookmark it
- Set workspaces to use both monitors - install
gnome-tweak-tooland, under "Workspaces", change "Workspaces only on primary display" (source).
- General stuff:
sudo apt-get install git emacs24 autocutsel openjdk-7-jre openssh-server texlive-latex-base texlive-latex-recommended pandoc nautilus-open-terminal
sudo apt-get install python-scipy python-matplotlib python-numpy python-pandas python-pip ipython ipython-notebook pyflakes
- Stuff which is rather out of date in the Ubuntu repos:
sudo pip install cython
sudo pip install -update pandas(or, if you want the dev version, do
pip install -e git+git://github.com/pydata/pandas.git#egg=pandas)
I used to use pip to install stuff but you have to install lots of build dependencies which takes up hundreds of megabytes of space, plus pip doesn't automatically keep your system up to date, unlike aptitude. Here's what I used to do:
sudo pip install numpy
sudo apt-get install libpng-dev libjpeg8-dev libfreetype6-dev python-gtk2-dev(required for pip install of matplotlib); or do
sudo apt-get build-dep matplotlib
sudo pip install matplotlib
sudo pip install pandas
Ubuntu restricted extras (enables playback of Coarsera videos in Chromium)
Files and directories to back up before doing a re-install
- /home/jack/ (make sure to copy all the hidden files like .bashrc)
Use case: from the command line, you want a quick and easy way to jump to frequently used directories.
Method one: use the
source operator. For example, I want a shortcut
~/Documents/imperial/PhD. So I create a file called
p which just
contains the text
cd '~/Documents/imperial/PhD'. On
bash I type
. p to execute the code in the file (if I used a bash script then the
change directory would only affect the script and would not be
persistent when the script terminates).
csh doesn't have a "
operator. Instead you have to type "
source p". Or alias
source by adding the line
alias . 'source' to
Method two: just add an alias to change directory. e.g.
alias p 'cd ~/Documents/imperial/PhD to
Network Time Protocol client
To set up NTP, I followed the instructions
I commented out the lines in
/etc/ntp.conf for Ubuntu's own NTP
servers and instead used
mcc.ac.uk is Manchester University). There's
an (out of date) list of public NTP servers
sandvika.net gives a "host name not found" error) and a longer
Permenantly disable a kernel module (without recompiling)
blacklist MODNAME" to
blacklist ums_realtek" (note that a newline is required after
the module name) (which was required to stop "Assuming drive cache:
write through" on my Lenovo S10e netbook (running Ubuntu 12.04 server)).
Blacklist info found on serverfault;
removing ums_realtek to fix problem on netbook found on
sudo apt-get install cpufrequtils cpufreq-info
sudo apt-get install acpi acpi -V Battery 0: Full, 100% Battery 0: design capacity 2808 mAh, last full capacity 1996 mAh = 71% Adapter 0: on-line Thermal 0: ok, 55.0 degrees C Thermal 0: trip point 0 switches to mode critical at temperature 86.0 degrees C Thermal 0: trip point 1 switches to mode passive at temperature 80.0 degrees C Cooling 0: LCD 0 of 10 Cooling 1: Processor 0 of 10 Cooling 2: Processor 0 of 10
System info display when you SSH into a machine
To get this displayed when you SSH into a machine:
~/$ ssh vaio jack@vaio's password: Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-27-generic i686) * Documentation: https://help.ubuntu.com/ System information as of Fri Aug 10 11:19:02 BST 2012 System load: 0.63 Processes: 72 Usage of /: 6.6% of 19.83GB Users logged in: 1 Memory usage: 11% IP address for eth0: 192.168.1.64 Swap usage: 0% Graph this data and manage this system at https://landscape.canonical.com/
sudo apt-get install landscape-common update-motd
Compiz with Unity-2D
Intalling Ubuntu 12.04 on a circa-2004-computer with an nVidia GeForce PCX 5300, I noticed that Compiz was disabled by default. After lots of messing around with uninstalling and re-installing compiz, I stumbled across the following thread: How to run Compiz on Unity-2D. I then had to fix some of my settings, especially re-enabling dBus and animations and window decorations.