Estoy tratando de ejecutar un servidor Centos 8 a través de VirtualBox (6.1.30) (Vagrant), que funcionó bien ayer para mí, pero hoy intenté ejecutar una sudo yum update . Sigo recibiendo este error por alguna razón:

 [vagrant@192.168.38.4] ~ >> sudo yum update CentOS Linux 8 - AppStream 71 B/s | 38 B 00:00 Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

Ya intenté cambiar los espacios de nombres en /etc/resolve.conf , eliminé las carpetas dnf y todo. En otras computadoras, esto funciona bien, así que creo que el problema está en mi máquina host. También intenté restablecer la configuración de red (estoy en el host win 10), sin éxito tampoco. No es un problema de DNS, funciona bien.

Actualización: reinstalé Windows, todavía tengo el mismo error en mi máquina virtual

dnf.log:

 2022-01-31T15:28:03+0000 INFO --- logging initialized --- 2022-01-31T15:28:03+0000 DDEBUG timer: config: 2 ms 2022-01-31T15:28:03+0000 DEBUG Loaded plugins: builddep, changelog, config-manager, copr, debug, debuginfo-install, download, generate_completion_cache, groups-manager, needs-restarting, playground, repoclosure, repodiff, repograph, repomanage, reposync 2022-01-31T15:28:03+0000 DEBUG YUM version: 4.4.2 2022-01-31T15:28:03+0000 DDEBUG Command: yum update 2022-01-31T15:28:03+0000 DDEBUG Installroot: / 2022-01-31T15:28:03+0000 DDEBUG Releasever: 8 2022-01-31T15:28:03+0000 DEBUG cachedir: /var/cache/dnf 2022-01-31T15:28:03+0000 DDEBUG Base command: update 2022-01-31T15:28:03+0000 DDEBUG Extra commands: ['update'] 2022-01-31T15:28:03+0000 DEBUG User-Agent: constructed: 'libdnf (CentOS Linux 8; generic; Linux.x86_64)' 2022-01-31T15:28:05+0000 DDEBUG Cleaning up. 2022-01-31T15:28:05+0000 SUBDEBUG Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/dnf/repo.py", line 574, in load ret = self._repo.load() File "/usr/lib64/python3.6/site-packages/libdnf/repo.py", line 397, in load return _repo.Repo_load(self) libdnf._error.Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 67, in main return _main(base, args, cli_class, option_parser_class) File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 106, in _main return cli_run(cli, base) File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 122, in cli_run cli.run() File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 1050, in run self._process_demands() File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 740, in _process_demands load_available_repos=self.demands.available_repos) File "/usr/lib/python3.6/site-packages/dnf/base.py", line 394, in fill_sack self._add_repo_to_sack(r) File "/usr/lib/python3.6/site-packages/dnf/base.py", line 137, in _add_repo_to_sack repo.load() File "/usr/lib/python3.6/site-packages/dnf/repo.py", line 581, in load raise dnf.exceptions.RepoError(str(e)) dnf.exceptions.RepoError: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist 2022-01-31T15:28:05+0000 CRITICAL Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist