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:

_images/2020-09-22-azure-grub-failed-install.png

I clicked Yes to continue, and all was well.

Salt¶

Uninstall Salt (Master and Minion)…

Update:

# /etc/apt/sources.list.d/saltstack.list:
deb http://repo.saltstack.com/py3/ubuntu/20.04/amd64/latest focal main

Re-install Salt

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 …

LetsEncrypt¶

For Ubuntu 20.04, we are using the certbot package:

rm -rf /opt/letsencrypt

For more information, see the diff: Use ‘certbot’ package (rather than letsencrypt git repo)