DanielKotik

Mail Clients (MUA) with S/MIME Support

Desktop

Windows

• Microsoft Outlook http://office.microsoft.com/en-us/outlook-help/get-a-digital-id-HP010355070.aspx?CTT=5&origin=HP010356428

DanielKotik

# based on the following:
# http://saintgimp.org/2013/01/22/merging-two-git-repositories-into-one-repository-without-losing-file-history/
# http://blog.caplin.com/2013/09/18/merging-two-git-repositories/

git clone repo_main
git clone repo_sub
cd repo_main

git remote add repo_sub ../repo_sub
git fetch repo_sub

DanielKotik

# Install/update SOPS to latest on Fedora - https://github.com/mozilla/sops
echo "[+] Install/upgrade SOPS"
SOPS_VERSION=$(curl -s https://api.github.com/repos/mozilla/sops/releases/latest | jq .tag_name | tr -d '"')
dnf install -y https://github.com/mozilla/sops/releases/download/${SOPS_VERSION}/sops-${SOPS_VERSION}-1.x86_64.rpm
sops --version
# sops 3.2.0 (latest)

DanielKotik

psql: FATAL: Peer authentication failed for user “postgres” (or any user)

The connection failed because by default psql connects over UNIX sockets using peer authentication, that requires the current UNIX user to have the same user name as psql. So you will have to create the UNIX user postgres and then login as postgres or use sudo -u postgres psql database-name for accessing the database (and psql should not ask for a password).

If you cannot or do not want to create the UNIX user, like if you just want to connect to your database for ad hoc queries, forcing a socket connection using psql --host=localhost --dbname=database-name --username=postgres (as pointed out by @meyerson answer) will solve your immediate problem.

But if you intend to force password authentication over Unix sockets instead of the peer method, try changing the following pg_hba.conf* line:

from

DanielKotik

Pipenv Cheat Sheet

some links:

• https://pipenv-fork.readthedocs.io/en/latest/basics.html
• https://realpython.com/pipenv-guide/
• https://docs.python-guide.org/dev/virtualenvs/

Install pipenv

pip3 install pipenv

DanielKotik

# -*- coding: utf-8 -*-
"""Demonstrate high quality docstrings.

Module-level docstrings appear as the first "statement" in a module. Remember,
that while strings are regular Python statements, comments are not, so an
inline comment may precede the module-level docstring.

After importing a module, you can access this special string object through the
``__doc__`` attribute; yes, it's actually available as a runtime attribute,
despite not being given an explicit name! The ``__doc__`` attribute is also

DanielKotik

git branch -m old_branch new_branch         # Rename branch locally    
git push origin :old_branch                 # Delete the old branch    
git push --set-upstream origin new_branch   # Push the new branch, set local branch to track the new remote

DanielKotik

#Heading 1 ##Heading 2 ###Heading 3 ####Heading 4 #####Heading 5 ######Heading 6

---

Paragraph

DanielKotik

/*
This Program uses OS independet boost library 'asio'.

Below are some web links for programming UDP sockets with linux specific libraries using functions: 'gethostbyname', 'bind' and
'socket'. Please note, however, that these functions are superseded by 'getaddrinfo' and 'getnameinfo' nowadays. These functions
provide better support for IPv6.

https://www.ibm.com/developerworks/library/wa-ipv6.html
http://openbook.rheinwerk-verlag.de/linux_unix_programmierung/Kap11-016.htm#RxxKap11016040003951F04F100
https://www.cs.rutgers.edu/~pxk/417/notes/sockets/udp.html

DanielKotik

import matplotlib as mpl
import matplotlib.pyplot as plt
import numpy as np

class MidpointNormalize(mpl.colors.Normalize):
    """
    class to help renormalize the color scale
    """
    def __init__(self, vmin=None, vmax=None, midpoint=None, clip=False):
        self.midpoint = midpoint