jdeathe

How to Enable RSyslog Debugging for Systemd Service Manager

Ref:

• man rsyslogd
• https://www.rsyslog.com/how-to-use-debug-on-demand/

Create a drop-in configuration for the service

1. As root level user, use systemctl edit to create a configuration override.

jdeathe

MySQL Query Cache

How to add a 32M query cache with an item limit of 1M.

Enable on a Running MySQL Server

NOTE: You might need to add '-p' to the following command if 'root'@'localhost' requires a password on your environment.

# mysql \

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# To install:
#     sudo cat grow-root.service > /etc/systemd/system/grow-root.service
#     sudo systemctl daemon-reload
#     sudo systemctl enable -f grow-root.service
#
# Start (auto disables after first successful expansion):
#     sudo systemctl start grow-root.service
#
# Debugging:
#     sudo systemctl status grow-root.service

jdeathe

Identify Unavailable IUS PHP Packages Between 5.6 and 7.1

For all installed packages prefixed with php56u, check for availability php71u package.

# yum list installed \
| grep -o '^php56u[^ ]*' \
| { \
  mapfile -t packages; \
 for package in "${packages[@]}"; do \

jdeathe

Installation and Usage of Certbot on CentOS

Installation

Install certbot-auto

# mkdir -p /opt/{bin,certbot/bin} \
  && curl -sS \
 -o /opt/certbot/bin/certbot-auto \

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# ------------------------------------------------------------------------------
# Ref: https://docs.docker.com/compose/compose-file/
# 
# Install docker for Mac: 
# https://www.docker.com/products/docker
# 
# docker-compose -p local_jenkins down
# docker-compose -p local_jenkins up -d
# docker-compose -p local_jenkins logs
# 

jdeathe

CentOS - Keeping Time with Chrony

Both CentOS-6 and CentOS-7 provide chrony as an alternative to the traditional ntp service. Chrony is a good fit for virtualised guests - a Vagrant box using the VirtualBox provider where you don't have/want the VirtualBox Guest Additions installed on the guest.

Installation

First install the chrony package with yum.

# yum -y install chrony

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<?php

$responseCode = 500;
$responseCodeOk = 200;
$responseCodeFail = 503;
$url = 'https://www.deathe.org/';

$ch = curl_init();

curl_setopt_array(

jdeathe

Docker - Varnish Cache with Apache HTTP Backend

Create Network

$ docker network create \
  --driver bridge \
  bridge_t1

jdeathe

Generate a File Listing for Review

Fields

• Last Modified
• Size (bytes)
• Relative Path

Command

Replace {{search-path}} with the path to search.