The straight sewing stitch mentioned above is actually called a running stitch.

The blind stitch that is also mentioned is actually called a fell stitch. If you do a search on blind stitch you'll only find the blind hem stitching method which is a variation on the catch stitch used for hemming and not at all the stitch that ChattanCat is talking about.

Other than those two clarifications, you should have no trouble finding resources on the internet or youtube for instructions and diagrams.