We’ve all had a bad experience that we don’t want to talk about, wherein we accidentally deleted or lost important files. In college, I started using this as the first line of defence, after I accidentally deleted two days of work immediately before a meeting with my research advisor:

# use trash-cli (apt-get install trash-cli) to save deleted files in "recycle

alias rm='trash-put'

We owe this to our employers and customers, as well as ourselves. Re-doing work is expensive and soul-sucking. And you will lose or accidentally delete something at some point.