无法连接到 in.archive.ubuntu.com:http:

无法连接到 in.archive.ubuntu.com:http:

尝试更新时我收到这些错误。

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]

我该如何解决这个问题?

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