# Packages

## Dependency Resolution Failure / Duplicate Packages
If e.g. an update attempt ends up in something like
```bash
yum update

Loaded plugins: langpacks, search-disabled-repos
Resolving Dependencies
...
--> Finished Dependency Resolution
Error: Package: sssd-dbus-1.16.5-10.el7_9.12.x86_64 (@rhel7)
        Requires: sssd-common = 1.16.5-10.el7_9.12
        Removing: sssd-common-1.16.5-10.el7_9.12.x86_64 (@rhel7)
            sssd-common = 1.16.5-10.el7_9.12
        Updated By: sssd-common-1.16.5-10.el7_9.15.x86_64 (rhel7)
            sssd-common = 1.16.5-10.el7_9.15
        Removing: sssd-common-1.16.5-10.el7_9.13.x86_64 (@rhel7)
...
```

best check if one of these packages is twice listed as installed:
```bash
rpm -qa sssd-common
sssd-common-1.16.5-10.el7_9.13.x86_64
sssd-common-1.16.5-10.el7_9.12.x86_64
```
Now you can try to remove one or both packages, maybe you need to remove also packages which depend on this one. Then install it again. 

## Berkley DB Issue

### BDB0087 DB_RUNRECOVERY

If the error message is
```bash
error: rpmdb: BDB0113 Thread/process 21389/140229907089216 failed: BDB1507 Thread died in Berkeley DB library
error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db5 -  (-30973)
error: cannot open Packages database in /var/lib/rpm
CRITICAL:yum.main:

Error: rpmdb open failed
```

then do 

```bash
mv /var/lib/rpm/__db* /tmp
yum clean all
```

### BDB0091 DB_VERSION_MISMATCH

For
```bash
RPM: error: db5 error(-30969) from dbenv->open: BDB0091 DB_VERSION_MISMATCH: Database environment version mismatch
RPM: error: cannot open Packages index using db5 -  (-30969)
RPM: error: cannot open Packages database in /var/lib/rpm
Error: Could not run transaction.
```
do

```bash
yum clean all
rpm --rebuilddb
```


## Rebuild RPM Database
When `yum`, `dnf` or `rpm` hang or have errors pointing to a problem with their database, then follow the
[Guide to rebuild a corrupted RPM database](https://www.tecmint.com/rebuild-corrupted-rpm-database-in-centos/) 

## RPM Integrity Check
The integratity of installed package can be checked with `rpm`:

```bash
rpm -Vv pciutils
.........    /usr/sbin/lspci
.........    /usr/sbin/setpci
.........    /usr/sbin/update-pciids
.........    /usr/share/doc/pciutils-3.5.1
.........  d /usr/share/doc/pciutils-3.5.1/COPYING
.........  d /usr/share/doc/pciutils-3.5.1/ChangeLog
.........  d /usr/share/doc/pciutils-3.5.1/README
.........  d /usr/share/doc/pciutils-3.5.1/pciutils.lsm
.........  d /usr/share/man/man8/lspci.8.gz
.........  d /usr/share/man/man8/setpci.8.gz
.........  d /usr/share/man/man8/update-pciids.8.gz
```

Running `rpm -Vav` will verify **all** installed packages and take a long time. See the man page for details on the output format. Changes, especially in configuration files, can be normal, though.