root@armadillo:~/keibi/keibi# sudo apt -y install build-essential Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: binutils binutils-arm-linux-gnueabihf binutils-common bzip2 cpp cpp-8 dpkg-dev fakeroot g++ g++-8 gcc gcc-8 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libasan5 libatomic1 libbinutils libc-dev-bin libc6-dev libcc1-0 libdpkg-perl libfakeroot libfile-fcntllock-perl libgcc-8-dev libgomp1 libisl19 liblocale-gettext-perl libmpc3 libmpfr6 libstdc++-8-dev libubsan1 linux-libc-dev make manpages manpages-dev patch xz-utils Suggested packages: binutils-doc bzip2-doc cpp-doc gcc-8-locales gcc-8-doc libstdc++6-8-dbg gcc-multilib autoconf automake libtool flex bison gdb gcc-doc libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg libasan5-dbg liblsan0-dbg libtsan0-dbg libubsan1-dbg libmpx2-dbg libquadmath0-dbg glibc-doc git bzr libstdc++-8-doc make-doc ed diffutils-doc The following NEW packages will be installed: binutils binutils-arm-linux-gnueabihf binutils-common build-essential bzip2 cpp cpp-8 dpkg-dev fakeroot g++ g++-8 gcc gcc-8 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libasan5 libatomic1 libbinutils libc-dev-bin libc6-dev libcc1-0 libdpkg-perl libfakeroot libfile-fcntllock-perl libgcc-8-dev libgomp1 libisl19 liblocale-gettext-perl libmpc3 libmpfr6 libstdc++-8-dev libubsan1 linux-libc-dev make manpages manpages-dev patch xz-utils 0 upgraded, 39 newly installed, 0 to remove and 3 not upgraded. Need to get 7197 kB/41.5 MB of archives. After this operation, 127 MB of additional disk space will be used. Err:1 http://ftp.jp.debian.org/debian buster/main armhf xz-utils armhf 5.2.4-1 404 Not Found [IP: 150.65.7.130 80] Err:2 http://ftp.jp.debian.org/debian buster/main armhf libc-dev-bin armhf 2.28-10 404 Not Found [IP: 150.65.7.130 80] Ign:3 http://ftp.jp.debian.org/debian buster/main armhf linux-libc-dev armhf 4.19.171-2 Err:4 http://ftp.jp.debian.org/debian buster/main armhf libc6-dev armhf 2.28-10 404 Not Found [IP: 150.65.7.130 80] Err:5 http://ftp.jp.debian.org/debian buster/main armhf libdpkg-perl all 1.19.7 404 Not Found [IP: 150.65.7.130 80] Err:6 http://ftp.jp.debian.org/debian buster/main armhf dpkg-dev all 1.19.7 404 Not Found [IP: 150.65.7.130 80] Err:3 http://ftp.jp.debian.org/debian buster/main armhf linux-libc-dev armhf 4.19.171-2 404 Not Found [IP: 150.65.7.130 80] E: Failed to fetch http://ftp.jp.debian.org/debian/pool/main/x/xz-utils/xz-utils_5.2.4-1_armhf.deb 404 Not Found [IP: 150.65.7.130 80] E: Failed to fetch http://ftp.jp.debian.org/debian/pool/main/g/glibc/libc-dev-bin_2.28-10_armhf.deb 404 Not Found [IP: 150.65.7.130 80] E: Failed to fetch http://security.debian.org/pool/updates/main/l/linux/linux-libc-dev_4.19.171-2_armhf.deb 404 Not Found [IP: 150.65.7.13] E: Failed to fetch http://ftp.jp.debian.org/debian/pool/main/g/glibc/libc6-dev_2.28-10_armhf.deb 404 Not Found [IP: 150.65.7.130 80] E: Failed to fetch http://ftp.jp.debian.org/debian/pool/main/d/dpkg/libdpkg-perl_1.19.7_all.deb 404 Not Found [IP: 150.65.7.130 80] E: Failed to fetch http://ftp.jp.debian.org/debian/pool/main/d/dpkg/dpkg-dev_1.19.7_all.deb 404 Not Found [IP: 150.65.7.130 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?