Pacminder is a simple helper for you not to forget to update your system every once in a while.
For Linux Arch users there is a package in the AUR. Just execute
yay -S pacminder
Clone this repository, cd into it and create a build directory
git clone https://github.com/samox73/pacminder.git
cd pacminder
mkdir build
then enter the build directory, run cmake, execute the resulting Makefile and install as super user:
cd build
cmake ..
make
sudo make install
To make us of pacminder, e.g. place
pacminder
in your .bashrc