- List version of an installed package:
dpkg -s docker-ce | grep Version - Show all available versions of a package:
apt-cache madison <package>
Packages being held back because of phasing
Run the following command replacing the package in question
apt-get --with-new-pkgs upgrade <package-name>The following packages have been kept back
Try the following, in order. Each is less risky than the next. Stop as soon as you have fixed the problem.
Solution 1
apt-get --with-new-pkgs upgrade <list of packages kept back>Solution 2
apt-get install <list of packages kept back>Failed to fetch . . . Hash Sum mismatch
If you see an error similar to the following
Reading package lists... Done
E: Failed to fetch https://packages.cloud.google.com/apt/dists/cloud-sdk/main/binary-all/Packages Hash Sum mismatch
Hashes of expected file:
- Filesize:1677314 [weak]
- SHA256:09c3377dd2740e63c831dea4a86ccb1253ab6a41ec71eaa1cd4c7e52ee8c9255
- MD5Sum:16ab83da58155f40c9a5a18a2a8c6587 [weak]
Hashes of received file:
- SHA256:ee6eabdfda398ab36e6fa8cd777d5d02b45dbac892dacdf6f1be1ca5ad0cbb65
- MD5Sum:6dd0c5ac95bc55b7864e66986b71b8fa [weak]
- Filesize:1677314 [weak]
Last modification reported: Fri, 04 Apr 2025 01:54:07 +0000
Release file created at: Tue, 01 Apr 2025 12:57:58 +0000
E: Failed to fetch https://packages.cloud.google.com/apt/dists/cloud-sdk/main/binary-amd64/Packages
E: Some index files failed to download. They have been ignored, or old ones used instead.Try removing all of the apt list data
rm -rf /var/lib/apt/lists/* && apt-get update