maxme

#!/bin/bash

# Before running this script, make sure you have sysbench installed:
#           sudo apt-get install sysbench
#
# This script helps you check if your Raspberry pi is correctly powered.
# You can read more about Raspberry pi powering issues here: https://ownyourbits.com/2019/02/02/whats-wrong-with-the-raspberry-pi/


# If you're pi is correctly powered (stable power supply and quality cable), after running the script, you should get something like:

jctosta

Screen Quick Reference

Basic

Description	Command
Start a new session with session name	screen -S <session_name>
List running sessions / screens	screen -ls
Attach to a running session	screen -x
Attach to a running session with name	screen -r

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

archerslaw

# /bin/systemctl restart  libvirtd.service
# /bin/systemctl enable  libvirtd.service

Note:
How to turn on the debug logs for libvirtd.
1)open /etc/libvirt/libvirtd.conf in your favourite editor.
2)find & replace, or set these variables:
log_level = 1
log_filters="3:remote 4:event 3:json 3:rpc" | log_filters="1:qemu_monitor_json"
log_outputs="1:file:/var/log/libvirt/libvirtd.log"

Adirael

#!/bin/bash
#
# This script configures WordPress file permissions based on recommendations
# from http://codex.wordpress.org/Hardening_WordPress#File_permissions
#
# Author: Michael Conigliaro <mike [at] conigliaro [dot] org>
#
WP_OWNER=www-data # <-- wordpress owner
WP_GROUP=www-data # <-- wordpress group
WP_ROOT=$1 # <-- wordpress root directory