Adding and removing Jupyter kernels

 Using the following command to see the currently installed kernels:

jupyter kernelspec list

And the following command to remove an installed kernel (in my case an updated version has been installed):

jupyter kernelspec uninstall julia-1.9

To add an updated version of Julia kernel into Jupyter, it is sufficient to:

Pkg.build("IJulia")

These simple things need to become part of my muscle memory. 

cargo-update

 As the number of cargo-installed packages increases on my computer, I naturally wonder if there is a convenient way to keep them up-to-date. cargo-update does exactly that. I can first do:

cargo install-update -l

to see if any installed packages are out-of-date. If so, I can then:

cargo install-update <pkg>

to get it updated.

Zoxide

 Zoxide is such a small, nice command line utility that significantly reduce the amount of typing. It works with the Nushell nicely.