fernandoaleman

brew tap homebrew/versions
brew install v8-315

gem install libv8 -v '3.16.14.13' -- --with-system-v8
gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

bundle install

fernandoaleman

For MacOS Catalina, visit Install mysql2 on MacOS Catalina

Problem

Installing mysql2 gem errors on MacOS Mojave.

Solution

Make sure openssl is installed on Mac via Homebrew.

fernandoaleman

How to Check Swap Space

There are several ways to check swap space in Linux.

• The free command with the -h tag shows the total, available, and used swap space in a human-readable format.

free -h

fernandoaleman

How To Install and Run ClamAV on CentOS 7

ClamAV is an open-source antivirus. It is used to detect viruses, trojans, and malware.

Install ClamAV

Install EPEL repository

yum install -y epel-release

fernandoaleman

# How to sign your custom RPM package with GPG key

# Step: 1
# Generate gpg key pair (public key and private key)
#
# You will be prompted with a series of questions about encryption.
# Simply select the default values presented. You will also be asked
# to create a Real Name, Email Address and Comment (comment optional).
# 
# If you get the following response:

fernandoaleman

## Configure eth0
#
# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
NM_CONTROLLED="yes"
ONBOOT=yes
HWADDR=A4:BA:DB:37:F1:04
TYPE=Ethernet
BOOTPROTO=static

fernandoaleman

#!/bin/sh
# you might want to add some user authentication here
mysql -e "show variables; show status" | awk '  
{
VAR[$1]=$2  
}
END {  
MAX_CONN = VAR["max_connections"]  
MAX_USED_CONN = VAR["Max_used_connections"]  
BASE_MEM=VAR["key_buffer_size"] + VAR["query_cache_size"] + VAR["innodb_buffer_pool_size"] + VAR["innodb_additional_mem_pool_size"] + VAR["innodb_log_buffer_size"]  

fernandoaleman

Install RabbitMQ on CentOS 7

sudo yum -y install epel-release
sudo yum -y update

Install Erlang

Download repository

fernandoaleman

Problem

Installing mysql2 gem errors on Apple silicon M1, M2 or M3 Mac running macOS Sonoma.

Solution

Make sure mysql-client, openssl and zstd are installed on Mac via Homebrew.

Replace mysql-client with whichever mysql package you are using

fernandoaleman

How To Clean Up Ubuntu

Some simple ways to free up space on Ubuntu

Remove Unnecessary Packages and Dependencies

apt-get autoremove