Ao tentar atualizar, estou recebendo esses erros.
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libr/libreoffice/libreoffice-calc_5.4.5-0ubuntu0.17.10.1_amd64.deb Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.161 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libr/libreoffice/libreoffice-base-core_5.4.5-0ubuntu0.17.10.1_amd64.deb Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.161 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libr/libreoffice/libreoffice-core_5.4.5-0ubuntu0.17.10.1_amd64.deb Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.161 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/m/mesa/libxatracker2_17.2.8-0ubuntu0~17.10.1_amd64.deb Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.161 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/s/simple-scan/simple-scan_3.26.3-0ubuntu0.17.10.0_amd64.deb Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.161 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/t/thunderbird/thunderbird_52.6.0+build1-0ubuntu0.17.10.1_amd64.deb Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.161 80]
Como posso resolver o problema?