Ubuntu

debsums

debsums is a useful utility to validate packages in a ubuntu or debian system.

Usage:

sudo debsums -c

If this identifies any problems you can fix them using.:

sudo apt install --reinstall <package name>

If debsums idenfifies several packages with issues, to fix all of them use:

sudo apt install --reinstall $(dpkg -S $(debsums -c) | cut -d : -f 1 | sort -u)

For more information there is a useful post about debsums on askubuntu

Upgrade to 20.04

do-release-upgrade

Tip

If 20.04.1 is still not released when you run this command, then you can upgrade using do-release-upgrade -d.

Tip

Just so you remember, an additional SSH daemon will be started at port ‘1022’.

• Select the recommended option for the LXD snap track i.e. version 4.0

This message was displayed at the end of the upgrade:

I clicked Yes to continue, and all was well.

Postgres Upgrade Cluster

To move the data from Postgres 10 to 12, run the following as root:

# list the clusters
pg_lsclusters

# drop the new (empty) cluster
pg_dropcluster 12 main --stop
# migrate the data from 10 to 12
pg_upgradecluster 10 main

# remove the 10 cluster
pg_dropcluster 10 main --stop

# remove the old database engine
apt remove postgresql-10

# list the clusters
pg_lsclusters
Ver Cluster Port Status Owner    Data directory              Log file
10  main    5432 online postgres /var/lib/postgresql/10/main /var/log/postgresql/postgresql-10-main.log

For more information, see Postgres Upgrade Cluster …

Obsolete major version 10

The PostgreSQL version 10 is obsolete, but the server or client packages are still installed. Please install the latest packages (postgresql-12 and postgresql-client-12) and upgrade the existing clusters with pg_upgradecluster

Please be aware that the installation of postgresql-12 will automatically create a default cluster 12/main. If you want to upgrade the 10/main cluster, you need to remove the already existing 12 cluster (pg_dropcluster –stop 12 main, see manpage for details).

The old server and client packages are no longer supported. After the existing clusters are upgraded, the postgresql-10 and postgresql-client-10 packages should be removed.

Please see /usr/share/doc/postgresql-common/README.Debian.gz for details.