https://www.traccar.org/blog/traccar-5-5/
https://www.traccar.org/upgrading-traccar/
Version shows in the log.
Please next time do at least some basic research before asking for help. Most of what you asked is in documentation and/or discussed on the forum in the past.
Hello
1-What are the changes and features added in version 5.5?
2-where can I see the current version of my traccar?
3-How to update traccar to the latest version through the Linux cli environment?
Thankful