Cygwin is a Linux-like environment for Windows. It consists of two parts:

• A DLL (cygwin1.dll) which acts as a Linux API emulation layer providing substantial Linux API functionality.
• A collection of tools which provide Linux look and feel.

If you're a Rails developer on Windows you may need this little tool, so install it from...

• Installer

More Info here...

• Cygwin

In a bout of syntactical changes, Rails 2.0 harks the end of the .rhtml file extension; to be replaced with .erb

To change all your existing .rhtml files to .html.erb, run:

for f in $(find . -name '*.rhtml') ; do c=$(dirname $f)/$(basename $f .rhtml).html.erb ; hg mv $f $c ; done

The .html is to help with working out what contents are in the file, as it could in theory have both.

• .html.erb = html
• .css.erb = css

p.s. the script above doesn't do .css.erb, that's something you'll have to decide whether to use.

Thanks to Duncan Ponting for this.

Quickie here, below is a simple command to backup your MySQL database to a fully datestamped file...

mysqldump -u user mydbname > "backup_`date +%Y%m%d_%H%M`.sql"

Replace 'user' with your MySQL username and mydbname with the name of the database your making a dump of.

The > pipes the output to the file.

The 'date' part uses Linux's date function to append date digits inside the filename. The ' embeds it inside the filename.

So in the end you should end up with a file something like...

backup_20071030_1700.sql

Neat!