Fetched 47.5 MB in 2min 44s (290 kB/s) Reading package lists... Done E: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/bionic-updates/main/binary-amd64/by-hash/SHA256/9f5543ef134074f84535178118828e8560408303829c243da538f95536ca2bcf Hash Sum mismatch Hashes of expected file: - Filesize:751864 [weak] - SHA256:9f5543ef134074f84535178118828e8560408303829c243da538f95536ca2bcf - SHA1:204aa27c8bf931a22170c82c0f7b086055c87617 [weak] - MD5Sum:29504f8f179f17a00edaee0daa1575bd [weak] Hashes of received file: - SHA256:71187588239b415b6acd24a11323b3b0a195174ef6e6999fa48112f2ead87836 - SHA1:a4d87b6008a381f367892cd7097ca7b204a6f385 [weak] - MD5Sum:b262c26e548bed8f35b224f7919433e0 [weak] - Filesize:751864 [weak] Last modification reported: Fri, 11 Oct 2019 01:21:27 +0000 Release file created at: Fri, 11 Oct 2019 01:20:44 +0000 E: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/dists/bionic-updates/universe/binary-amd64/by-hash/SHA256/9aface298664deaa1710b60d37533257c811afea531c06d2db2e63a6cd72a65a E: Some index files failed to download. They have been ignored, or old ones used instead.