1- Is StaMPS tool only used on Linux Ubuntu?
there are cases where it worked on Windows (here), but Linux is recommended
2- Do I need matlab to use StaMPS?
yes, and also triangle and snaphu (links are given in the in the stamps manual)
3- If I need matlab, what is the version that I have to use?
Doesn’t really matter, but the signal processing toolbox must be included in the installation.
4- Does StaMPS apply for PSI technique only or can I use it for SBAS technique too?
StaMPS allows SBAS as well, but currently you can only prepare single-master approaches with SNAP.
5- Do you have a guide that I can read to learn how to use StaMPS?
Please check here: StaMPS - Detailled instructions
6- What is the difference between StaMPS and viStaMPS, or are the same tool?
viStaMPS is something entirely different and was developed for the visualisation of results generated with StaMPS. But StaMPS also allows visualization, so you don’t ultimately need it.
7- Does StaMPS apply only for Sentinel-1 SAR images?
No, any prepared SAR time-series can be used.
8- What other tools do you recommend me to apply PSI and SBAS techniques?
Please check the list of resources above. Once you have Matlab and StaMPS installed correctly, you are ready to go.