getting this error when running system update
sudo apt-get update Hit:1 focal InRelease Hit:2 focal-updates InRelease Hit:3 focal-backports InRelease Hit:4 stable InRelease Hit:5 focal InRelease Hit:6 focal-security InRelease Hit:7 apt/dev/ InRelease Hit:8 focal-proposed InRelease Get:9 stable InRelease [4,317 B] Hit:10 focal InRelease Hit:11 stable InRelease Hit:12 focal InRelease Hit:13 stable InRelease Hit:14 focal InRelease Get:15 ./ InRelease [2,441 B] Get:16 stable/main amd64 Packages [7,398 B] Err:16 stable/main amd64 Packages File has unexpected size (7660 != 7398). Mirror sync in progress? [IP: 99.84.126.35 443] Hashes of expected file: - Filesize:7398 [weak] - SHA512:8bd5e753fce431f6e7cf8111722cd89c296598b62b335fd839e4c85c90d348a61347a456f3f8d117e3ae4c035cff797549eb2f4d5ecdccbc949d397c1b7e56ca - SHA256:bb14d8a13aac904ca0410bf622f7d062f3336273d94a7a33b881d223234f7167 - SHA1:fe3f258c595be080b276763c160a04c4bc2f59ca [weak] - MD5Sum:6a2fa07708eb6be197aae80b61a5906c [weak] Release file created at: Sat, 31 Jul 2021 06:46:39 +0000 Fetched 6,758 B in 2s (3,237 B/s) Reading package lists... Done E: Failed to fetch File has unexpected size (7660 != 7398). Mirror sync in progress? [IP: 99.84.126.35 443] Hashes of expected file: - Filesize:7398 [weak] - SHA512:8bd5e753fce431f6e7cf8111722cd89c296598b62b335fd839e4c85c90d348a61347a456f3f8d117e3ae4c035cff797549eb2f4d5ecdccbc949d397c1b7e56ca - SHA256:bb14d8a13aac904ca0410bf622f7d062f3336273d94a7a33b881d223234f7167 - SHA1:fe3f258c595be080b276763c160a04c4bc2f59ca [weak] - MD5Sum:6a2fa07708eb6be197aae80b61a5906c [weak] Release file created at: Sat, 31 Jul 2021 06:46:39 +0000 E: Some index files failed to download. They have been ignored, or old ones used instead. 1 Answer
Solution ... just wait several minutes and rerun the update
sudo apt-get update evidently I ran the command in middle of system updates getting refreshed upstream ... personally system should not expose this level of detail to enduser ... certainly it should avoid printing out the word error instead make this a notice message
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