Latest Ubuntu 16 user agents:

User Agent Browser Device
Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Safari/605.1.15 Ubuntu/16.04 (3.18.11-0ubuntu1) Epiphany/3.18.11 GNOME Web 3 Unknown
Mozilla/5.0 (X11; Ubuntu; Linux i686) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Safari/605.1.15 Ubuntu/16.04 (3.18.11-0ubuntu1) Epiphany/3.18.11 GNOME Web 3 Unknown
Mozilla/5.0 (X11; Ubuntu 16.04; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0 Firefox 91 Unknown
Mozilla/5.0 (X11; Ubuntu 16.04; Linux Kernel 3.2.0-88.126) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0 Chrome 60 Unknown
Mozilla/5.0 (X11; Ubuntu 16.04; Linux Kernel 3.2.0-88.126) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0 Chrome 53 Unknown
Mozilla/5.0 (Ubuntu 16.04 LTS; rv:144) Gecko/20100101 Firefox/144 Firefox 144 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04; like Android 9;) AppleWebKit/537.36 Chrome/87.0.4280.144 Safari/537.36 Chrome 87 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04) AppleWebKit/537.36 Chromium/57.0.2987.110 Safari/537.36 Chromium 57 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04) AppleWebKit/537.36 Chromium/55.0.2883.75 Safari/537.36 Chromium 55 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04) AppleWebKit/537.36 Chrome/87.0.4280.144 Safari/537.36 Chrome 87 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04) AppleWebKit/537.36 Chrome/77.0.3865.129 Safari/537.36 Chrome 77 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04) AppleWebKit/537.36 Chrome/65.0.3325.151 Safari/537.36 Chrome 65 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 9;) AppleWebKit/537.36 Chrome/87.0.4280.144 Safari/537.36 Chrome 87 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 9;) AppleWebKit/537.36 Chrome/87.0.4280.144 Mobile Safari/537.36 Chrome Mobile 87 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 9) AppleWebKit/603.36 Chrome/108.0.3865.129 Safari/537.36 Chrome 108 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 9) AppleWebKit/537.36 Chrome/87.0.4280.144 Mobile Safari/537.36 Chrome Mobile 87 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 9) AppleWebKit/537.36 Chrome/77.0.3865.129 Mobile Safari/537.36 Chrome Mobile 77 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.144 Mobile Safari/537.36 Chrome Mobile 87 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 4.4) AppleWebKit/537.36 Chromium/65.0.3325.151 Mobile Safari/537.36 Chromium 65 Unknown
Mozilla/5.0 (Linux; Ubuntu 16.04 like Android 4.4) AppleWebKit/537.36 Chromium/55.0.2883.75 Mobile Safari/537.36 Chromium 55 Unknown