In some situations we need to know which packages we have installed in a Debian or Ubuntu system. In that case, we can use the tool dpkg, which will give us the information we need.
Next command will give us the current packages installed with different states:
The states we can have are:
- install: The package is selected for installation.
- hold: A package marked to be on hold is not handled by dpkg, unless forced to do that with option –force-hold.
- deinstall: The package is selected for deinstallation (i.e. we want to remove all files, except configuration files).
- purge: The package is selected to be purged (i.e. we want to remove everything from system directories, even configuration files).
Continue reading List installed packages in Ubuntu
Grafana is an open source metric analytics & visualization tool which can help us to monitor the system with a nice Dashboard.
Step 1: Installing Grafana
Grafana is available in the APT packages repository, however it could not be the latest version, so we’ll use the official Grafana repository.
First, it is needed to create the file
/etc/apt/sources.list.d/grafana.list and add the following into it:
deb https://packages.grafana.com/oss/deb stable main
There is a separate repository for beta releases:
deb https://packages.grafana.com/oss/deb beta main
Then it is needed to add the GPG Key, in order to install signed packages:
$ curl https://packages.grafana.com/gpg.key | sudo apt-key add -
Continue reading How to Monitor an Ubuntu Server with Grafana & Prometheus