Today I got same issue and @pujanm's suggestion is solved the problem. # apt-get update Get:1 http://archive.ubuntu.com/ubuntu bionic InRelease [242 kB] Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88,7 kB] Get:3 https://repo.skype.com/deb stable InRelease [4.487 B] Ign:4 http://dl.google.com/linux/chrome/deb stable InRelease Get:5 http://archive.canonical.com/ubuntu bionic InRelease [10,2 kB] Ign:6 http://repo.vivaldi.com/stable/deb stable InRelease Get:7 http://dl.google.com/linux/chrome/deb stable Release [943 B] Get:8 http://repo.vivaldi.com/stable/deb stable Release [3.831 B] Get:9 http://repo.vivaldi.com/stable/deb stable Release.gpg [833 B] Get:10 http://archive.canonical.com/ubuntu bionic/partner amd64 Packages [2.320 B] Get:11 http://dl.google.com/linux/chrome/deb stable Release.gpg [819 B] Get:12 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88,7 kB] Ign:13 http://packages.linuxmint.com tessa InRelease Get:14 http://security.ubuntu.com/ubuntu bionic-security/main i386 Packages [265 kB] Get:15 http://archive.canonical.com/ubuntu bionic/partner i386 Packages [2.320 B] Get:16 http://archive.canonical.com/ubuntu bionic/partner Translation-en [1.276 B] Get:17 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74,6 kB] Get:18 https://repo.skype.com/deb stable/main amd64 Packages [2.274 B] Get:19 http://repo.vivaldi.com/stable/deb stable/main i386 Packages [1.193 B] Get:20 http://packages.linuxmint.com tessa Release [24,1 kB] Get:21 http://archive.ubuntu.com/ubuntu bionic/main i386 Packages [1.007 kB] Ign:22 https://artifacts.elastic.co/packages/7.x/apt stable InRelease Get:23 http://repo.vivaldi.com/stable/deb stable/main amd64 Packages [1.197 B] Get:24 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [353 kB] Get:25 https://artifacts.elastic.co/packages/7.x/apt stable Release [5.116 B] Get:26 http://dl.google.com/linux/chrome/deb stable/main amd64 Packages [1.104 B] Get:27 https://artifacts.elastic.co/packages/7.x/apt stable Release.gpg [473 B] Get:28 http://repository.spotify.com stable InRelease [3.316 B] Get:29 http://security.ubuntu.com/ubuntu bionic-security/main Translation-en [125 kB] Get:30 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [14,9 kB] Get:31 http://security.ubuntu.com/ubuntu bionic-security/restricted amd64 Packages [4.296 B] Get:32 http://security.ubuntu.com/ubuntu bionic-security/restricted i386 Packages [4.280 B] Get:33 http://security.ubuntu.com/ubuntu bionic-security/restricted Translation-en [2.192 B] Get:34 http://security.ubuntu.com/ubuntu bionic-security/universe i386 Packages [249 kB] Get:35 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [253 kB] Get:36 https://artifacts.elastic.co/packages/7.x/apt stable/main i386 Packages [6.380 B] Get:37 http://security.ubuntu.com/ubuntu bionic-security/universe Translation-en [142 kB] Get:38 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [35,8 kB] Get:39 http://security.ubuntu.com/ubuntu bionic-security/multiverse i386 Packages [4.152 B] Get:40 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages [1.019 kB] Get:41 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 Packages [4.004 B] Get:42 http://security.ubuntu.com/ubuntu bionic-security/multiverse Translation-en [2.060 B] Get:43 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 DEP-11 Metadata [2.464 B] Get:44 https://artifacts.elastic.co/packages/7.x/apt stable/main amd64 Packages [8.129 B] Get:45 http://packages.linuxmint.com tessa Release.gpg [819 B] Get:46 http://packages.linuxmint.com tessa/main amd64 Packages [14,2 kB] Get:47 http://archive.ubuntu.com/ubuntu bionic/main Translation-en [516 kB] Get:48 http://packages.linuxmint.com tessa/main i386 Packages [13,6 kB] Get:49 http://packages.linuxmint.com tessa/upstream i386 Packages [38,1 kB] Get:50 http://archive.ubuntu.com/ubuntu bionic/main amd64 DEP-11 Metadata [477 kB] Get:51 http://repository.spotify.com stable/non-free amd64 Packages [1.643 B] Get:52 http://archive.ubuntu.com/ubuntu bionic/restricted i386 Packages [9.156 B] Get:53 http://archive.ubuntu.com/ubuntu bionic/restricted amd64 Packages [9.184 B] Get:54 http://packages.linuxmint.com tessa/upstream amd64 Packages [38,1 kB] Get:55 http://archive.ubuntu.com/ubuntu bionic/restricted Translation-en [3.584 B] Get:56 http://archive.ubuntu.com/ubuntu bionic/universe i386 Packages [8.531 kB] Get:57 http://packages.linuxmint.com tessa/import i386 Packages [4.863 B] Get:58 http://packages.linuxmint.com tessa/import amd64 Packages [5.711 B] Get:59 http://packages.linuxmint.com tessa/backport amd64 Packages [29,3 kB] Get:60 http://repository.spotify.com stable/non-free i386 Packages [1.171 B] Get:61 http://packages.linuxmint.com tessa/backport i386 Packages [29,3 kB] Get:62 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages [8.570 kB] Get:63 http://archive.ubuntu.com/ubuntu bionic/universe Translation-en [4.941 kB] Get:64 http://archive.ubuntu.com/ubuntu bionic/universe amd64 DEP-11 Metadata [3.287 kB] Get:65 http://archive.ubuntu.com/ubuntu bionic/multiverse i386 Packages [144 kB] Get:66 http://archive.ubuntu.com/ubuntu bionic/multiverse amd64 Packages [151 kB] Get:67 http://archive.ubuntu.com/ubuntu bionic/multiverse Translation-en [108 kB] Get:68 http://archive.ubuntu.com/ubuntu bionic/multiverse amd64 DEP-11 Metadata [49,7 kB] Get:69 http://archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages [517 kB] Err:69 http://archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages Hash Sum mismatch Hashes of expected file: - Filesize:516960 [weak] - SHA256:a301397270fa9801cad24973b8ecef6e7a48bddb3abb941f4c5c0171735d2588 - SHA1:4b3a314719181e6c4f3121b25d556a6f75b3527d [weak] - MD5Sum:006d71a5e1760c1973da2be1f91e9858 [weak] Hashes of received file: - SHA256:dff723dfa7bc3e1cdeab9f7881c20b3e78d82908a5f7d85a4b8a1f01eb13710f - SHA1:73fd36a7da8f96cbc4d96cc96a4072041bb18f01 [weak] - MD5Sum:dad2c1e5024f14242f6d19188ecfd7fb [weak] - Filesize:516960 [weak] Last modification reported: Thu, 30 May 2019 06:55:44 +0000 Release file created at: Thu, 30 May 2019 06:55:16 +0000 Get:70 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [618 kB] Err:70 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages Get:71 http://archive.ubuntu.com/ubuntu bionic-updates/main Translation-en [229 kB] Get:72 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [276 kB] Get:73 http://archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [6.996 B] Get:74 http://archive.ubuntu.com/ubuntu bionic-updates/restricted i386 Packages [6.960 B] Get:75 http://archive.ubuntu.com/ubuntu bionic-updates/restricted Translation-en [3.076 B] Get:76 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [943 kB] Get:77 http://archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages [931 kB] Get:78 http://archive.ubuntu.com/ubuntu bionic-updates/universe Translation-en [277 kB] Get:79 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [227 kB] Get:80 http://archive.ubuntu.com/ubuntu bionic-backports/main i386 Packages [2.516 B] Get:81 http://archive.ubuntu.com/ubuntu bionic-backports/main amd64 Packages [2.512 B] Get:82 http://archive.ubuntu.com/ubuntu bionic-backports/main Translation-en [1.644 B] Get:83 http://archive.ubuntu.com/ubuntu bionic-backports/universe i386 Packages [3.720 B] Get:84 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 Packages [3.716 B] Get:85 http://archive.ubuntu.com/ubuntu bionic-backports/universe Translation-en [1.696 B] Get:86 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [7.224 B] Fetched 35,1 MB in 15s (2.347 kB/s) Reading package lists... Done E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-updates/main/binary-i386/by-hash/SHA256/a301397270fa9801cad24973b8ecef6e7a48bddb3abb941f4c5c0171735d2588 Hash Sum mismatch Hashes of expected file: - Filesize:516960 [weak] - SHA256:a301397270fa9801cad24973b8ecef6e7a48bddb3abb941f4c5c0171735d2588 - SHA1:4b3a314719181e6c4f3121b25d556a6f75b3527d [weak] - MD5Sum:006d71a5e1760c1973da2be1f91e9858 [weak] Hashes of received file: - SHA256:dff723dfa7bc3e1cdeab9f7881c20b3e78d82908a5f7d85a4b8a1f01eb13710f - SHA1:73fd36a7da8f96cbc4d96cc96a4072041bb18f01 [weak] - MD5Sum:dad2c1e5024f14242f6d19188ecfd7fb [weak] - Filesize:516960 [weak] Last modification reported: Thu, 30 May 2019 06:55:44 +0000 Release file created at: Thu, 30 May 2019 06:55:16 +0000 E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-updates/main/binary-amd64/by-hash/SHA256/f23be066321a96fbabda25aaac6025209f1814e1f29cdbfde8116d73aaa71f0b E: Some index files failed to download. They have been ignored, or old ones used instead.