Howto Ubuntu

• My ubuntu setup cache

Notes about installing and setup of various apps and features in Ubuntu

• Apache
  • Apache:configuration
  • Secure directories under Apache (htaccess style)
• Ruby and Rails and RVM

• Mediawiki
• Mysql
• Trac

• SSH notes
• ssh with a private-public key
• SVN - Subversion
• simpleproxy - Simple TCP proxy for linux
• VirtualBox

• Emacs - some of my favoritre customizations
• SciTe / Scintilla - the lightweight programmers editor
• OpenOffice
• Grep - grep and egrep usage tips

• Octave (MatLab alternative)

• XMMS setup for Ubuntu 8.04 and up - from source
  • XMMS setup for Ubuntu Hardy - from deb.

• Ubuntu setup
  • Users and permissions in Linux / Ubuntu

Other nice external links and howto-s

Make an iso image from a CD

cat /dev/scd0 > mycd.iso

Mass search and replace in files (with sed)

for i in $(find . -type f); do sed 's/oldstring/newstring/g' $i > $i-tmp; mv $i $i-backup; mv $i-tmp $i; done

Mass file rename

Replace spaces with underscores in all file names of the directory. then rename *.JPG to *.jpg

rename 's/ /_/g' *
rename 's/.JPG/.jpg/g' *

DV/Firewire for Ubuntu

https://help.ubuntu.com/community/Firewire

Acroread on Ubuntu

The link.

Check the ports and apps listening on them

netstat -lnptu

Listing members of a group

I.e., the opposite to the command 'groups myuser'

sudo apt-get install members     [if needed]
members groupname

Custom autocomplete in Ubuntu

It is nice to use TAB key to autocomlete path for example, for a ls command in bash. It turns out, you can also autocomplete certain command arguments, e.g. apt-get inst<TAB> expands to apt-get install. Even better, you can define your own completion rules for other commands and applications.

Read more on "howto" here: part 1 and part 2

Create your own apt-get repositories

The link.

A short example:

Get the tools

sudo aptitude install dpkg-dev

Create the repository structure. You can use any other location accessible from the web.

cd ~/public_html
mkdir my-repository
cd my-repository
mkdir binary
mkdir source

Copy your deb packages to your repository

cp src/bzr_0.11-1.1_all.deb public_html/my-repository/binary/

Create a repository index

cd my-repository
dpkg-scanpackages binary /dev/null | gzip -9c > binary/Packages.gz
dpkg-scansources source /dev/null | gzip -9c > source/Sources.gz

Using the repository. Add these two lines into the /etc/apt/sources.list

deb http://example.com/~myuser/my-repository binary/
deb-src http://example.com/~myuser/my-repository source/

Optionally, add the security key. Read about it elsewhere...

Kill-ing a process for sure

The link.

In short, ways to kill in the order of fierceness:

ps aux | grep gaim
kill 1234
pkill gaim
sudo kill 1234
kill -1 1234
kill -2 1234
kill -9 1234
killall gaim
killall -9 gaim

How to merge PDF documents

Nice writeup was found here. You need to install pdftk, unless you have it already. Then use it like this to merge files 1,2 and 3 to a file merged.pdf.

sudo apt-get install pdftk
pdftk 1.pdf 2.pdf 3.pdf cat output merged.pdf