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One major change is that, starting with this version, new instances are created using LMDB by default, instead of BerkeleyDB which was the default previously. See link:++https://www.port389.org/docs/389ds/FAQ/Berkeley-DB-deprecation.html++[here] for more information.
Switch pam_userdb from BerkeleyDB to GDBM
`pam_userdb` was built with support for BerkeleyDB, but this project is no longer maintained as open source, so it has been replaced by GDBM in Fedora 40. See the link:++https://docs.fedoraproject.org/en-US/fedora/latest/system-administrators-guide/pam_userdb/++[Fedora System Administrator's Guide] for information about how to convert.
Support for the `enumeration` feature has been removed for AD and IPA backends
The `enumeration` feature provides the ability to list all users or groups using `getent passwd` or `getent group' without arguments. Support for the `enumeration` feature has been removed for AD and FreeIPA providers.
`sss_ssh_knownhostsproxy` tool will be replaced in future releases
`sss_ssh_knownhostsproxy` tool has been deprecated and will be replaced by a new, more efficient tool. See link:++https://github.com/SSSD/sssd/issues/5518++[upstream ticket] for details.
Removing SSSD `files provider`
Previously deprecated SSSD "files provider" feature that allows handling of local users has been removed in Fedora 40. This does not affect default configuration where local users are handled by glibc module (`libnss_files.so.2`), which is most cases. In case of specific configuration that requires SSSD to handle local users (smart card authentication or session recording of local users), switch to `proxy provider` instead. If you fall into one of these use cases, see the link:++https://sssd.io/docs/files-provider-deprecation.html++[upstream documentation] for more details.
Authselect minimal profile replaced by local
The `minimal` profile for Authselect is now replaced by `local`. The new `local` profile is based on `minimal` but gains additional optional features, it is used to serve local users and groups without SSSD. This migration from `minimal` to `local` profile is performed automatically with a new installation or upgrade to Fedora 40 and users are not affected. However, users should adapt their scripts to the new `local` profile since the `minimal` profile is no longer available.
`bogofilter` to use SQLite
Bogofilter (`bogofilter` package) is a fast anti-spam filtering mechanism that uses Bayesian statistical analysis to classify emails as either spam or non-spam. It uses Berkeley DB (`libdb` package) as its database engine for storing word probabilities and other relevant data used in the filtering process.
With this release, Bogofilter switched its database engine from Berkeley DB to SQLite, because Fedora deprecated the `libdb` package.
Bogofilter supports only one database backend at a time, therefore the updated `bogofilter` package will be unable to process the `libdb` data. As a result, the new package provides a migration script. Alternatively, you can migrate your word lists manually with this command `bogomigrate-berkeley ~/.bogofilter/wordlist.db`.
Podman 5
The `podman` container engine has been upgraded to version 5, which provides multiple bug fixes and enhancements. Notable changes include:
Dropped support for `cgroups` version 1 (environments have to switch to `cgroups` version 2)
Deprecated Container Networking Interface (CNI) plugins (environments have to switch to the `netavark` network stack)
Deprecated BoltDB
Set `passt` as the default rootless network service instead of `slirp4netns`
Improved handling of the `containers.conf` file
Isolated `podman` bindings to ensure improved usability
For full extent of updates, see the link:https://github.com/containers/podman/blob/main/RELEASE_NOTES.md#500[upstream release notes].
ROCm 6
The ROCm stack for graphics processing unit (GPU) computation has been updated to version 6, which provides multiple bug fixes and enhancements. Notable changes include:
Improved performance in areas like lower precision math and attention layers
New hipSPARSELt library to accelerate AI workloads through the AMD sparse matrix core technique
Latest support for AI frameworks like PyTorch, TensorFlow, and JAX
New support for libraries such as DeepSpeed, ONNX-RT, and CuPy
For full extent of updates, see the link:https://rocm.docs.amd.com/en/latest/about/CHANGELOG.html#rocm-6-0-0[upstream release notes].

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  1. fedora-docs-l10n/fedora-release-notes
  2. f40/pages/sysadmin
  3. English
Podman 5
Podman 5
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type: Title ==
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no-wrap, read-only
Source string location
./pages/sysadmin.adoc:53
String age
2 months ago
Last updated
a month ago
Source string age
2 months ago
Translation file
pot/f40/pages/sysadmin.pot, string 24