bashrc alias "alert" - notify-send not installed

Binary package hint: bash

In the ~/.bashrc the following alias is defined:

 alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

The Problem is: notify-send isn't installed by default.

My opinion: Aliases which doesn't work are not really user friendly - so the bashrc (or maybe the default packages) should be cleaned up.

Environment and Information:

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu
$ lsb_release -rd
Description: Ubuntu 10.10
Release: 10.10

2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
$ apt-cache policy bash
bash:
  Installed: 4.1-2ubuntu4
  Candidate: 4.1-2ubuntu4
  Version table:
 *** 4.1-2ubuntu4 0
        500 http://ch.archive.ubuntu.com/ubuntu/ maverick/main amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen
I expected a alert.

4) What happened instead

The program 'notify-send' is currently not installed. You can install it by typing:
sudo apt-get install libnotify-bin