List the installed packages on your Ubuntu box

I found out how to do this recently and thought it might be helpful to some people. To output this information to a file in your home directory you would use,

CODE:
dpkg --get-selections > installed-software

And if you wanted to use the list to reinstall this software on a fresh ubuntu setup,

Code:

dpkg --set-selections < installed-software

followed by

Code:

dselect

How to get rid of spaces in file names

for file in *\ * ; do mv "${file}" "${file// /_}" ; done