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Here we will use the find -mtime and xargs commands

Complete script:

find '/home/user/data/' -name '*.txt' -mtime +7 | xargs rm

Explanation:
find -mtime displays files made based on given number of days

find '/home/user/data/' -name '*.txt' -mtime +7

xargs captures the result of a previous command and pass it as an argument for another function

find '/home/user/data/' -name '*.txt' -mtime +7 | xargs rm

The result of the find command is passed to another function rm which then removes the files

Check if your laptop is fully compatible with ubuntu

http://www.ubuntu.com/certification/

Automate the deploy of your project on svn commit, this require you have access to your svn server

On your server got to your repo folder
/usr/local/svn/my_repo
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then go to hooks folder
/usr/local/svn/my_repo/hooks
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then copy the post-commit.tpl to post-commit
cp post-commit.tpl post-commit

the post-commit file is a file called by subversion after every commit, basically its a bash script
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chmod the post-commit file
chmod +x post-commit
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Now lets edit the post-commit file.
Lets say your project dev directory resides on the same server, the post-commit file has content so we erase them all and add this

#!bin/usr/bash
cd /home/dev_website
svn up .

what the bash does is change directory to the /home/dev_website then execute the svn update command
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and were done, next time there is no need to log in to the server just to svn update of your dev website.

cat /etc/redhat-release

Command to generate a decent random password

openssl rand -base64 6