Video editor Gun/Linux

Open-source video editors over the years have generally never had the feature set offered by proprietary video editing apps, but in recent years at least there has been some measurable progress to the likes of Kdenlive and OpenShot. 

I have used kdnenlive. It relies on few other projects such as FFmpeg and MLT video framework. It's pretty simple to use. I can crop, edit, move and delete video clips. Now it's no Adobe Premiere or Sony Vegas but it doesn't cost you anything. 

Unless you are doing really high end stuff or working on a project where someone else is using Adobe Premiere or Sony Vegas then kdnenlive will work for average person.