Использую значит Linux Mint 20.3,решил обновиться до 21,проводиться первый этап обновления,где проверяются apt кеши. На 95 процентах выдает такие ошибки: Err:137 https://hub.unity3d.com/linux/repos/deb stable InRelease Could not connect to hub.unity3d.com:443 (34.76.163.2), connection timed out Fetched 64,3 MB in 31s (2 097 kB/s) Reading package lists… W: Failed to fetch https://repo.skype.com/deb/dists/stable/InRelease 503 Servi ce Unavailable [IP: 23.210.170.232 443] W: Failed to fetch https://hub.unity3d.com/linux/repos/deb/dists/stable/InReleas e Could not connect to hub.unity3d.com:443 (34.76.163.2), connection timed out W: Some index files failed to download. They have been ignored, or old ones used instead.