sudo apt install libgomp1 Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: binutils cpp-5 g++-5 gcc-5 gcc-5-base libasan2 libatomic1 libcc1-0 libcilkrts5 libgcc-5-dev libitm1 liblsan0 libmpx0 libquadmath0 libstdc++-5-dev libstdc++6 libtsan0 libubsan0 Suggested packages: binutils-doc gcc-5-locales g++-5-multilib gcc-5-doc libstdc++6-5-dbg gcc-5-multilib libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg libasan2-dbg liblsan0-dbg libtsan0-dbg libubsan0-dbg libcilkrts5-dbg libmpx0-dbg libquadmath0-dbg libstdc++-5-doc The following packages will be upgraded: binutils cpp-5 g++-5 gcc-5 gcc-5-base libasan2 libatomic1 libcc1-0 libcilkrts5 libgcc-5-dev libgomp1 libitm1 liblsan0 libmpx0 libquadmath0 libstdc++-5-dev libstdc++6 libtsan0 libubsan0 19 upgraded, 0 newly installed, 0 to remove and 183 not upgraded. Need to get 32.2 MB of archives. After this operation, 116 kB disk space will be freed. Do you want to continue? [Y/n] Err:1 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcc1-0 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:2 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 binutils amd64 2.26.1-1ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:3 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgomp1 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:4 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libitm1 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:5 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libatomic1 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:6 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libasan2 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:7 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 liblsan0 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:8 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libtsan0 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:9 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libubsan0 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:10 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcilkrts5 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:11 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libmpx0 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:12 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libquadmath0 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:13 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 g++-5 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:14 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libstdc++-5-dev amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:15 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgcc-5-dev amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:16 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 gcc-5 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:17 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 cpp-5 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:18 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 gcc-5-base amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] Err:19 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 libstdc++6 amd64 5.4.0-6ubuntu1~16.04.1 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libcc1-0_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/b/binutils/binutils_2.26.1-1ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libgomp1_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libitm1_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libatomic1_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libasan2_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/liblsan0_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libtsan0_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libubsan0_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libcilkrts5_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libmpx0_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libquadmath0_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/g++-5_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libstdc++-5-dev_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libgcc-5-dev_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/gcc-5_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/cpp-5_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/gcc-5-base_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?