root@armadillo:~# apt-get install python3 Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libmpdec2 libpython3-stdlib libpython3.7-minimal libpython3.7-stdlib python3-minimal python3.7 python3.7-minimal Suggested packages: python3-doc python3-tk python3-venv python3.7-venv python3.7-doc binfmt-support The following NEW packages will be installed: libmpdec2 libpython3-stdlib libpython3.7-minimal libpython3.7-stdlib python3 python3-minimal python3.7 python3.7-minimal 0 upgraded, 8 newly installed, 0 to remove and 7 not upgraded. Need to get 4036 kB/4224 kB of archives. After this operation, 19.6 MB of additional disk space will be used. Do you want to continue? [Y/n] Err:1 http://security.debian.org buster/updates/main armhf libpython3.7-minimal armhf 3.7.3-2+deb10u4 404 Not Found [IP: 146.75.114.132 80] Err:2 http://security.debian.org buster/updates/main armhf python3.7-minimal armhf 3.7.3-2+deb10u4 404 Not Found [IP: 146.75.114.132 80] Err:3 http://security.debian.org buster/updates/main armhf libpython3.7-stdlib armhf 3.7.3-2+deb10u4 404 Not Found [IP: 146.75.114.132 80] Err:4 http://security.debian.org buster/updates/main armhf python3.7 armhf 3.7.3-2+deb10u4 404 Not Found [IP: 146.75.114.132 80] E: Failed to fetch http://security.debian.org/pool/updates/main/p/python3.7/libpython3.7-minimal_3.7.3-2+deb10u4_armhf.deb 404 Not Found [IP: 146.75.114.132 80] E: Failed to fetch http://security.debian.org/pool/updates/main/p/python3.7/python3.7-minimal_3.7.3-2+deb10u4_armhf.deb 404 Not Found [IP: 146.75.114.132 80] E: Failed to fetch http://security.debian.org/pool/updates/main/p/python3.7/libpython3.7-stdlib_3.7.3-2+deb10u4_armhf.deb 404 Not Found [IP: 146.75.114.132 80] E: Failed to fetch http://security.debian.org/pool/updates/main/p/python3.7/python3.7_3.7.3-2+deb10u4_armhf.deb 404 Not Found [IP: 146.75.114.132 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?