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@AtulKsol
AtulKsol / psql-error-fix.md
Last active November 13, 2024 12:43
Solution of psql: FATAL: Peer authentication failed for user “postgres” (or any user)

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

@mubix
mubix / infosec_newbie.md
Last active March 10, 2025 09:42
How to start in Infosec
  • What do Etcd, Consul, and Zookeeper do?
    • Service Registration:
      • Host, port number, and sometimes authentication credentials, protocols, versions numbers, and/or environment details.
    • Service Discovery:
      • Ability for client application to query the central registry to learn of service location.
    • Consistent and durable general-purpose K/V store across distributed system.
      • Some solutions support this better than others.
      • Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
  • Centralized locking can be based on this K/V store.
@probonopd
probonopd / Wayland.md
Last active May 13, 2025 23:44
Think twice about Wayland. It breaks everything!

Think twice before abandoning Xorg. Wayland breaks everything!

Hence, if you are interested in existing applications to "just work" without the need for adjustments, then you may be better off avoiding Wayland.

Wayland solves no issues I have but breaks almost everything I need. Even the most basic, most simple things (like xkill) - in this case with no obvious replacement. And usually it stays broken, because the Wayland folks mostly seem to care about Automotive, Gnome, maybe KDE - and alienating everyone else (e.g., people using just an X11 window manager or something like GNUstep) in the process.


As 2024 is winding down:

How lambdas & closures are implemented

This post is in response to the WeekendDevPuzzle of 2022-01-22. This thread has submissions from people who chose to share their perspectives on the puzzle. I'll be linking this post to this Twitter thread, to avoid polluting the original one.

Why this topic?

Given that I started these puzzles as a way to peel the onion, so to say, lambdas + closures make for a particularly great subject, because of the large difference between our mental models of them (useful while programming), vs how they're actually implemented.

You see, as programmers, we're quite comfortable with moving data around, be it when we're passing them as parameters to a function, or when returning values. Whether the data is in stack, heap, register, it doesn't matter, nor whether we're passing them by value or by reference. I mean, it does matter, but our mental models aren't too s

@bashbunni
bashbunni / .zshrc
Created October 27, 2022 21:41
CLI Pomodoro for Mac
# I'll be doing another one for Linux, but this one will give you
# a pop up notification and sound alert (using the built-in sounds for macOS)
# Requires https://github.com/caarlos0/timer to be installed
# Mac setup for pomo
alias work="timer 60m && terminal-notifier -message 'Pomodoro'\
-title 'Work Timer is up! Take a Break 😊'\
-appIcon '~/Pictures/pumpkin.png'\
-sound Crystal"