If you're executing commands like rm, dd, rsync ... or simply a presumably useful script found on some website which you forgot to adjust to your needs, the results can be dramatic. Just one wrong parameter - and you might run into losing important data. A nice way how to see beforehand what a program does is the python script maybe. Its usage is simple. Execute Code: maybe program and you'll see what program does to your files without actually doing it. The picture on above github site shows an example. After it shows you what the program does it offers to re-run it without maybe. maybe works by using ptrace to intercept all syscalls concerning the file system. On my Fedora system pip was already installed with the python3-pip package. So simply executing Code: sudo pip install maybe was enough to install maybe. I haven't tested it thoroughly yet. But in any case, maybe looks very interesting particularly if you write your own scripts or if you use scripts from someone else and want to test them safely.
This is really good, I think it remoes the need to test on snapshoted VM's. I'll see if I can install it.
