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@xirkus
xirkus / yubikey+gpupgp+ssh_howto.md
Last active February 16, 2026 18:26
Security Adventures 1. How to get yubikey+gpg+ssh+gitbhub working on MacOS

I've spent the day trying to get this setup working with GitHub and given the number of gotcha's I encountered, it seemed like a good idea to document how I finally got this working with as few hacks as possible. There's a lot of documentation out there (some of it old and misleading) and committing here for posterity will help me remember this when I inevitably need to do this again.

Rationale

Passwords are simply not enough these days. Regardless of the company, breaches (and the associated Personally Identifiable Information harvested) are a matter of not if, but when. There are a number of things you can do to protect yourself, but being on the tin-foil-hat side of paranoia, means there are a few Commandents that I adhere to (and recommend for other folks)[Insert link to Fight Club Rules for the Secure Internet].

That being said, if you use 2-factor authentication and have committed to using a hardware token such as the Yubikey, then you're already ahead of the curve. The problem is that wh

@ekanant
ekanant / docker_compose_mysql_backup.sh
Last active October 25, 2024 13:59
Backup and restore MySQL in docker-compose
#reference https://medium.com/@siriphonnot/backup-and-restore-a-mysql-database-from-a-running-docker-mysql-container-6c932907e21f
#reference https://medium.com/@vineetcic/script-to-take-mysql-database-backup-for-last-7-days-45f97ed067a9
mysqlUser="root"
mysqlPassword="xxxxx"
mysqlHost="127.0.0.1"
DB="my_db"
credentialsFile="/mysql-credentials.cnf"
/usr/local/bin/docker-compose exec -T mysql bash -c "
@hellt
hellt / R1_nokia.cfg
Created June 17, 2020 10:04
R1 Nokia baseline config
# TiMOS-B-14.0.R4 both/i386 Nokia 7750 SR Copyright (c) 2000-2016 Nokia.
# All rights reserved. All use subject to applicable license agreements.
# Built on Thu Jul 28 17:26:53 PDT 2016 by builder in /rel14.0/b1/R4/panos/main
# Generated SUN MAR 13 06:28:52 2016 UTC
exit all
configure
#--------------------------------------------------
echo "System Configuration"
@linuxmalaysia
linuxmalaysia / sysctl-conf.txt
Created June 7, 2020 02:33
sysctl.conf for elasticsearch node
vm.max_map_count=262144
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr
net.ipv4.tcp_notsent_lowat = 16384
net.core.somaxconn = 4096
# Increase size of file handles and inode cache
fs.file-max = 20971520
# Do less swapping
@s3rj1k
s3rj1k / HowTo
Last active July 23, 2026 00:25
Ubuntu 20.04.3 AutoInstall
# For recent versions of Ubuntu:
- https://www.pugetsystems.com/labs/hpc/ubuntu-22-04-server-autoinstall-iso/
# Docs:
- https://wiki.ubuntu.com/FoundationsTeam/AutomatedServerInstalls
- https://wiki.ubuntu.com/FoundationsTeam/AutomatedServerInstalls/ConfigReference
- https://cloudinit.readthedocs.io/en/latest/topics/datasources/nocloud.html
- https://discourse.ubuntu.com/t/please-test-autoinstalls-for-20-04/15250/53
# Download ISO Installer:
@marufshidiq
marufshidiq / HOWTO.md
Created April 12, 2020 07:03
Backup and Restore mongodb inside docker-compose container

How to backup

docker-compose exec -T <mongodb_service_name> mongodump --archive --gzip --db <mongodb_database> > dump.gz

How to restore

docker-compose exec -T  mongorestore --archive --gzip &lt; dump.gz
@ragul28
ragul28 / Docker-Export.md
Created January 11, 2020 09:02
Docker Container & image export/import

Export running or paused Container:

  • Export
docker export <dockernameortag> | gzip > mycontainer.tgz
  • Load
gunzip -c mycontainer.tgz | docker load
@G-UK
G-UK / Debootstrap Debian Arm64 OS for Raspberry Pi 3 & 4.md
Last active May 17, 2026 19:51
Build a 64bit Debian OS for the Raspberry Pi using Debootstrap

Introduction

The objective of these instructions is to create a complete Arm64 OS (Userland and Kernel) using Debian Debootstrap and RPI-Update for use on the Raspberry Pi 3 and 4.

Prerequisites:

  • An existing Debian/Raspbian system (any architecture will do)
  • An empty SD card formatted as per a standard Raspbian installation mounted to /mnt/sd on the build system
    • 1st Partition 0-256MB = FAT32 (Mount to /mnt/sd/boot)
    • 2nd Partition 256MB+ = EXT4 (Mount to /mnt/sd)

Set-up basic Debian system

@movd
movd / emails_from_ubuntu.md
Created June 6, 2019 11:02
Set up msmtp to send emails emails from Ubuntu/Debian Servers

Setting up email with SMTP on Ubuntu/Debian Servers

I used to sift trough my shell history and bookmarks every time I set up a new testing server in order to be able to send mails. So this should help...

Be aware don't use ssmtp anymore. It's unmaintained and has been removed from Debian and Ubuntu will most definitely follow suit.

Install msmtp

@tgfarias
tgfarias / main
Last active October 25, 2024 13:59
Docker commands
#Start docker
docker-compose up -d --build --force-recreate
#Import database
docker exec -i [container] mysql -u[user] -p[pass] [database] -v < [path_of_sql_import]
# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root -pPASSWORD DATABASE > backup.sql
docker exec CONTAINER /usr/bin/mysqldump -u root -pPASSWORD DATABASE | gzip > backup.sql.gz
docker exec CONTAINER /usr/bin/mysqldump -u root -pPASSWORD DATABASE | bzip2 > backup.sql.bz2