Question: I want to grep for today's date from zip file. How can do this?

I have a zip file called sen2616.z
I want to get all the data for today's date 09.02.2014

Answer: 
Please use `zipgrep`.

`zgrep` is for gz files, not for zip files.
`zipgrep` will work with zip files only.
If you want to grep all files, not only zipped files, then you could use [ugrep](https://github.com/Genivia/ugrep), which allows to do that with `-z` flag.