*TL;DR*: Hit y on any file page on GitHub to update the URL to a permanent link.
Many of you probably already know this. Here’s a handy tip for the rest. So you’re on Github and you want to link to a file in an email, PR, or JIRA report. Or better yet, you want to link to some specific lines in a file. So you do this: https://github.com/apache/spark/blob/master/ec2/spark_ec2.py#L805-L841 This is fine until someone changes the file. Now the link doesn’t make sense because the line numbers are all different. Instead, you want to do this: https://github.com/apache/spark/blob/582e5a24c55e8c876733537c9910001affc8b29b/ec2/spark_ec2.py#L805-L841 This link will always make sense. To get a link like this, you can just press y while you have the file open on github.com, and GitHub will update the address in your browser bar to a perma-link (i.e. from the former link to the latter). Nick
