Hola, necesito ayuda con esto (no entiendo mucho de informática), pero busqué como solucionar el problema que no podía hacer las actualizaciones y terminé en este problema
: jullia@jullia-Inspiron-1525:~$ sudo rm /var/lib/apt/lists/* -vf
[sudo] password for jullia:
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_main_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_main_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_main_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_main_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_main_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_main_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_main_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_multiverse_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_multiverse_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_multiverse_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_Release' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_restricted_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_restricted_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_universe_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_universe_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_universe_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_universe_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_universe_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-proposed_universe_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_Release' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_restricted_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_restricted_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_restricted_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_restricted_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_restricted_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_universe_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_universe_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_universe_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_universe_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_universe_i18n_Translation-es' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial_universe_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_multiverse_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_multiverse_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_multiverse_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_multiverse_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_multiverse_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_Release' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_restricted_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_restricted_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_restricted_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_restricted_source_Sources' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_binary-i386_Packages' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_i18n_Translation-en' borrado
'/var/lib/apt/lists/ar.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_source_Sources' borrado
'/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_xenial_partner_binary-i386_Packages' borrado
'/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_xenial_partner_i18n_Translation-en' borrado
'/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_xenial_partner_source_Sources' borrado
'/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_xenial_Release' borrado
'/var/lib/apt/lists/lock' borrado
rm: no se puede borrar '/var/lib/apt/lists/partial': Es un directorio
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_main_binary-i386_Packages' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_main_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_main_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_main_i18n_Translation-en' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_main_source_Sources' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_multiverse_binary-i386_Packages' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_multiverse_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_multiverse_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_multiverse_i18n_Translation-en' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_multiverse_source_Sources' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_Release' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_restricted_binary-i386_Packages' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_restricted_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_restricted_i18n_Translation-en' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_restricted_source_Sources' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_universe_binary-i386_Packages' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_universe_dep11_Components-i386.yml.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_universe_dep11_icons-64x64.tar.gz' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_universe_i18n_Translation-en' borrado
'/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_xenial-security_universe_source_Sources' borrado
jullia@jullia-Inspiron-1525:~$ sudo apt-get update
Des:1 http://archive.canonical.com/ubuntu xenial InRelease [11,5 kB]
Des:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Ign:1 http://archive.canonical.com/ubuntu xenial InRelease
Des:3 http://archive.canonical.com/ubuntu xenial/partner Sources [2.380 B]
Des:4 http://ar.archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Des:5 http://archive.canonical.com/ubuntu xenial/partner i386 Packages [3.124 B]
Des:6 http://archive.canonical.com/ubuntu xenial/partner Translation-en [1.616 B]
Ign:2 http://security.ubuntu.com/ubuntu xenial-security InRelease
Des:7 http://security.ubuntu.com/ubuntu xenial-security/main Sources [122 kB]
Des:8 http://ar.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Ign:4 http://ar.archive.ubuntu.com/ubuntu xenial InRelease
Des:9 http://ar.archive.ubuntu.com/ubuntu xenial-proposed InRelease [258 kB]
Ign:8 http://ar.archive.ubuntu.com/ubuntu xenial-updates InRelease
Des:10 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [65,0 kB]
Des:11 http://security.ubuntu.com/ubuntu xenial-security/restricted Sources [2.116 B]
Des:12 http://security.ubuntu.com/ubuntu xenial-security/multiverse Sources [2.120 B]
Des:13 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages [437 kB]
Des:14 http://ar.archive.ubuntu.com/ubuntu xenial/main Sources [868 kB]
Ign:9 http://ar.archive.ubuntu.com/ubuntu xenial-proposed InRelease
Des:15 http://security.ubuntu.com/ubuntu xenial-security/main Translation-en [212 kB]
Des:16 http://security.ubuntu.com/ubuntu xenial-security/main i386 DEP-11 Metadata [67,7 kB]
Des:17 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [68,0 kB]
Des:18 http://security.ubuntu.com/ubuntu xenial-security/restricted i386 Packages [7.224 B]
Des:19 http://security.ubuntu.com/ubuntu xenial-security/restricted Translation-en [2.152 B]
Des:20 http://security.ubuntu.com/ubuntu xenial-security/restricted i386 DEP-11 Metadata [199 B]
Des:21 http://security.ubuntu.com/ubuntu xenial-security/universe i386 Packages [300 kB]
Des:22 http://security.ubuntu.com/ubuntu xenial-security/universe Translation-en [130 kB]
Des:23 http://security.ubuntu.com/ubuntu xenial-security/universe i386 DEP-11 Metadata [107 kB]
Des:24 http://security.ubuntu.com/ubuntu xenial-security/universe DEP-11 64x64 Icons [142 kB]
Des:25 http://security.ubuntu.com/ubuntu xenial-security/multiverse i386 Packages [3.624 B]
Des:26 http://security.ubuntu.com/ubuntu xenial-security/multiverse Translation-en [1.744 B]
Des:27 http://security.ubuntu.com/ubuntu xenial-security/multiverse i386 DEP-11 Metadata [212 B]
Des:28 http://security.ubuntu.com/ubuntu xenial-security/multiverse DEP-11 64x64 Icons [29 B]
Des:29 http://ar.archive.ubuntu.com/ubuntu xenial/universe Sources [7.728 kB]
Des:30 http://ar.archive.ubuntu.com/ubuntu xenial/restricted Sources [4.808 B]
Des:31 http://ar.archive.ubuntu.com/ubuntu xenial/multiverse Sources [179 kB]
Des:32 http://ar.archive.ubuntu.com/ubuntu xenial/main i386 Packages [1.196 kB]
Des:33 http://ar.archive.ubuntu.com/ubuntu xenial/main Translation-es [432 kB]
Des:34 http://ar.archive.ubuntu.com/ubuntu xenial/main Translation-en [568 kB]
Des:35 http://ar.archive.ubuntu.com/ubuntu xenial/main i386 DEP-11 Metadata [733 kB]
Des:36 http://ar.archive.ubuntu.com/ubuntu xenial/main DEP-11 64x64 Icons [409 kB]
Des:37 http://ar.archive.ubuntu.com/ubuntu xenial/restricted i386 Packages [8.684 B]
Des:38 http://ar.archive.ubuntu.com/ubuntu xenial/restricted Translation-es [2.204 B]
Des:39 http://ar.archive.ubuntu.com/ubuntu xenial/restricted Translation-en [2.908 B]
Des:40 http://ar.archive.ubuntu.com/ubuntu xenial/restricted i386 DEP-11 Metadata [185 B]
Des:41 http://ar.archive.ubuntu.com/ubuntu xenial/universe i386 Packages [7.512 kB]
Des:42 http://ar.archive.ubuntu.com/ubuntu xenial/universe Translation-es [1.215 kB]
Des:43 http://ar.archive.ubuntu.com/ubuntu xenial/universe Translation-en [4.354 kB]
Des:44 http://ar.archive.ubuntu.com/ubuntu xenial/universe i386 DEP-11 Metadata [3.407 kB]
Des:45 http://ar.archive.ubuntu.com/ubuntu xenial/universe DEP-11 64x64 Icons [7.448 kB]
Des:46 http://ar.archive.ubuntu.com/ubuntu xenial/multiverse i386 Packages [140 kB]
Des:47 http://ar.archive.ubuntu.com/ubuntu xenial/multiverse Translation-es [83,5 kB]
Des:48 http://ar.archive.ubuntu.com/ubuntu xenial/multiverse Translation-en [106 kB]
Des:49 http://ar.archive.ubuntu.com/ubuntu xenial/multiverse i386 DEP-11 Metadata [62,4 kB]
Des:50 http://ar.archive.ubuntu.com/ubuntu xenial/multiverse DEP-11 64x64 Icons [230 kB]
Des:51 http://ar.archive.ubuntu.com/ubuntu xenial-updates/main Sources [305 kB]
Des:52 http://ar.archive.ubuntu.com/ubuntu xenial-updates/universe Sources [203 kB]
Des:53 http://ar.archive.ubuntu.com/ubuntu xenial-updates/restricted Sources [2.524 B]
Des:54 http://ar.archive.ubuntu.com/ubuntu xenial-updates/multiverse Sources [8.404 B]
Des:55 http://ar.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [713 kB]
Des:56 http://ar.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [321 kB]
Des:57 http://ar.archive.ubuntu.com/ubuntu xenial-updates/main i386 DEP-11 Metadata [319 kB]
Des:58 http://ar.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [221 kB]
Des:59 http://ar.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 Packages [7.524 B]
Des:60 http://ar.archive.ubuntu.com/ubuntu xenial-updates/restricted Translation-en [2.272 B]
Des:61 http://ar.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 DEP-11 Metadata [156 B]
Des:62 http://ar.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [577 kB]
Des:63 http://ar.archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en [252 kB]
Des:64 http://ar.archive.ubuntu.com/ubuntu xenial-updates/universe i386 DEP-11 Metadata [248 kB]
Des:65 http://ar.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [338 kB]
Des:66 http://ar.archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 Packages [15,5 kB]
Des:67 http://ar.archive.ubuntu.com/ubuntu xenial-updates/multiverse Translation-en [8.344 B]
Des:68 http://ar.archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 DEP-11 Metadata [7.148 B]
Des:69 http://ar.archive.ubuntu.com/ubuntu xenial-updates/multiverse DEP-11 64x64 Icons [14,3 kB]
Des:70 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/main Sources [18,0 kB]
Des:71 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/universe Sources [28,2 kB]
Des:72 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/restricted Translation-es [2.204 B]
Des:73 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/restricted i386 DEP-11 Metadata [200 B]
Des:74 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/main i386 Packages [35,7 kB]
Des:75 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/main Translation-es [432 kB]
Des:76 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/main Translation-en [19,7 kB]
Des:77 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/main i386 DEP-11 Metadata [6.988 B]
Des:78 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/main DEP-11 64x64 Icons [4.066 B]
Des:79 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/multiverse Translation-es [83,5 kB]
Des:80 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/multiverse i386 DEP-11 Metadata [2.468 B]
Des:81 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/multiverse DEP-11 64x64 Icons [2.638 B]
Des:82 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/universe i386 Packages [21,0 kB]
Des:83 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/universe Translation-es [1.215 kB]
Des:84 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/universe Translation-en [13,0 kB]
Des:85 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/universe i386 DEP-11 Metadata [4.600 B]
Des:86 http://ar.archive.ubuntu.com/ubuntu xenial-proposed/universe DEP-11 64x64 Icons [29 B]
Descargados 44,6 MB en 2min 31s (294 kB/s)
AppStream cache update completed, but some metadata was ignored due to errors.
Leyendo lista de paquetes... Hecho
W: Error de GPG: http://archive.canonical.com/ubuntu xenial InRelease: Se encontró al menos una firma inválida.
W: El repositorio «http://archive.canonical.com/ubuntu xenial InRelease» no está firmado.
N: Los datos de un repositorio como este no se pueden autenticar y por tanto su uso es potencialmente peligroso.
N: Vea la página de manual apt-secure(8) para los detalles sobre la creación de repositorios y la configuración de usuarios.
W: Error de GPG: http://security.ubuntu.com/ubuntu xenial-security InRelease: Se encontró al menos una firma inválida.
W: El repositorio «http://security.ubuntu.com/ubuntu xenial-security InRelease» no está firmado.
N: Los datos de un repositorio como este no se pueden autenticar y por tanto su uso es potencialmente peligroso.
N: Vea la página de manual apt-secure(8) para los detalles sobre la creación de repositorios y la configuración de usuarios.
W: Error de GPG: http://ar.archive.ubuntu.com/ubuntu xenial InRelease: Se encontró al menos una firma inválida.
W: El repositorio «http://ar.archive.ubuntu.com/ubuntu xenial InRelease» no está firmado.
N: Los datos de un repositorio como este no se pueden autenticar y por tanto su uso es potencialmente peligroso.
N: Vea la página de manual apt-secure(8) para los detalles sobre la creación de repositorios y la configuración de usuarios.
W: Error de GPG: http://ar.archive.ubuntu.com/ubuntu xenial-updates InRelease: Se encontró al menos una firma inválida.
W: El repositorio «http://ar.archive.ubuntu.com/ubuntu xenial-updates InRelease» no está firmado.
N: Los datos de un repositorio como este no se pueden autenticar y por tanto su uso es potencialmente peligroso.
N: Vea la página de manual apt-secure(8) para los detalles sobre la creación de repositorios y la configuración de usuarios.
W: Error de GPG: http://ar.archive.ubuntu.com/ubuntu xenial-proposed InRelease: Se encontró al menos una firma inválida.
W: El repositorio «http://ar.archive.ubuntu.com/ubuntu xenial-proposed InRelease» no está firmado.
N: Los datos de un repositorio como este no se pueden autenticar y por tanto su uso es potencialmente peligroso.
N: Vea la página de manual apt-secure(8) para los detalles sobre la creación de repositorios y la configuración de usuarios.
jullia@jullia-Inspiron-1525:~$ ^C
jullia@jullia-Inspiron-1525:~$ Error de GPG: http://ar.archive.ubuntu.com/ubuntu xenial InRelease: Se encontró al menos una firma inválida.
Error: no se encontró la orden
jullia@jullia-Inspiron-1525:~$ W: El repositorio «http://ar.archive.ubuntu.com/ubuntu xenial InRelease» no está firmado.^C
jullia@jullia-Inspiron-1525:~$
Por favor alguien que me ayude a solucionarlo!!!!