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Ubuntu Clean-up

As times goes by and ubuntu releases arrive i keep updating my good old home server and laptop. This leaves behind removed packages with remaining files.

These are my steps to keep ubuntu nice and tidy. I don't do this often, so i'm writing it here to remember on my next LST upgrade.

deborphan

The first util is deborphan, deborphan finds packages that have no packages depending on them. Which makes them a perfect candidate for removal. As usual, read the deborphan man page before start using it

How to pass arguments to a container

This short note covers container arguments by going through some use cases. First we create a test container

FROM ubuntu:latest
COPY ./entrypoint.sh /

ENTRYPOINT ["/entrypoint.sh"]
CMD ["/usr/bin/top", "-H"]

rsync cheat sheet

rsync -rtva -e ssh --delete Documents/Work user@hostname:~/Documents

r recurisve
t preserve times
v verbose
a archive - preserve ownership permisions, timestamp, same as -rlptgoD
e ssh - specify the remote shell to use

SSH client config file

My cheat sheet to configure ssh clients

based on

Generate keys

SSHD template configuration

Basic SSHD configuration template

Based on
Agent forwarding enabled
TCP port forwarding enabled, remote/local/dynamic

List linux users

this will list non system users only

getent passwd | awk -F: '$3 >= 1000 && $3 <=60000 { print $1}'

List of git aliases

Simple log

git config --global alias.slog "log --graph --all --topo-order --pretty='format:%h %ai %s%d (%an)'"

List git aliases

SSH Certificates

Create CA

A certificate authority is a third party trusted by hosts and users to sign each other public certificates. So user would need it's pub key signed by the CA in order to access host. And host would need it's pub certificate signed by the CA for users to trust that it's the host they intend to connect.

Host CA

Generate a host certificate authority

Lecture 1: Introduction to Research — [📝Lecture Notebooks] [▶️Video]
Lecture 2: Introduction to Python — [📝Lecture Notebooks] [▶️Video]
Lecture 3: Introduction to NumPy — [📝Lecture Notebooks] [▶️Video]
Lecture 4: Introduction to pandas — [📝Lecture Notebooks] [▶️Video]
Lecture 5: Plotting Data — [📝Lecture Notebooks] [[▶️Vide

	/**
	Source: ϴ gang
	URL: https://www.reddit.com/r/thetagang/comments/j1az74/blackscholes_equations_for_google_sheets/

	Instructions:
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