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Ubuntu 18.04 no puede instalar mono

tag-icon • tag-icon 18.04 apt mono
Ubuntu 18.04 no puede instalar mono

(He examinado las preguntas aparentemente similares que puedo encontrar y descubrí que no son un duplicado.

Mensaje de error:

Err:1 https://download.mono-project.com/repo/ubuntu stable-bionic/main amd64 libmono-corlib4.5-cil all 6.12.0.122-0xamarin1+ubuntu1804b1
  504  Gateway Timeout [IP: 117.18.232.200 443]
Get:2 https://download.mono-project.com/repo/ubuntu stable-bionic/main amd64 libmono-system-servicemodel-routing4.0-cil all 6.12.0.122-0xamarin1+ubuntu1804b1 [41.6 kB]
Fetched 41.6 kB in 16s (2,555 B/s)                                    
E: Failed to fetch https://download.mono-project.com/repo/ubuntu/pool/main/m/mono/libmono-corlib4.5-cil_6.12.0.122-0xamarin1+ubuntu1804b1_all.deb  504  Gateway Timeout [IP: 117.18.232.200 443]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Se han intentado las siguientes operaciones y ninguna funciona.

  1. apt-get update
  2. sigue la descarga monoinstruccionespara Ubuntu 18.04:
    1. sudo apt install gnupg ca-certificates
    2. sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
    3. `eco "debhttps://download.mono-project.com/repo/ubuntustable-bionic main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
    4. índice de actualización
  3. instalar nuevamente con fix-missing.

Información del sistema operativo:

> uname -a
Linux **** 5.4.0-87-generic #98~18.04.1-Ubuntu SMP Wed Sep 22 10:45:04 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

EIDT: Puedo recuperar directamente el paquete deb de tiempo de espera desde la URL, pero al instalarlo, dice:

dpkg: dependency problems prevent configuration of libmono-system-servicemodel-routing4.0-cil:
 libmono-system-servicemodel-routing4.0-cil depends on libmono-corlib4.5-cil (>= 4.0.0~alpha1); however:
  Package libmono-corlib4.5-cil is not installed.
 libmono-system-servicemodel-routing4.0-cil depends on libmono-system-configuration4.0-cil (>= 4.0.0~alpha1); however:
  Package libmono-system-configuration4.0-cil is not installed.
 libmono-system-servicemodel-routing4.0-cil depends on libmono-system-runtime-serialization4.0-cil (>= 4.0.0~alpha1); however:
  Package libmono-system-runtime-serialization4.0-cil is not installed.
 libmono-system-servicemodel-routing4.0-cil depends on libmono-system-servicemodel4.0a-cil (>= 3.2.3); however:
  Package libmono-system-servicemodel4.0a-cil is not installed.
 libmono-system-servicemodel-routing4.0-cil depends on libmono-system4.0-cil (>= 4.0.0~alpha1); however:
  Package libmono-system4.0-cil is not installed.

dpkg: error processing package libmono-system-servicemodel-routing4.0-cil (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libmono-system-servicemodel-routing4.0-cil

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