Many, many more...

There are so many commands that a comprehensive book about them would be the size of an encyclopedia. This chapter hasn't even covered a tenth of the subject, yet you can do much with what you learned here. If you wish, you may read some manual pages: sort(1), sed(1) and zip(1) (yes, that's what you think: you can extract or make .zip archives with GNU/Linux), convert(1), and so on. The best way to get accustomed to these tools is to practice and experiment with them, and you will probably find a lot of uses for them, even quite unexpected ones. Have fun!