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Install Jekyll on Amazon Linux 2

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Here’s the script to install Jekyll on Amazon Linux 2.

#!/bin/bash
sudo hostnamectl set-hostname jekyll
sudo yum update -y
sudo amazon-linux-extras install ruby2.4 -y
sudo yum install ruby ruby-devel -y
sudo yum groupinstall "Development Tools" -y
sudo gem install bundler 
sudo gem install rdoc
sudo gem update --system
sudo gem install jekyll
jekyll new myblog

To start the Jekyll server.

cd mysite
jekyll build
jekyll serve --host 0.0.0.0

Open your browser and point it to the external IP of your instance on port 4000. 

http://xxx.xxx.xxx.xxx:4000

You may to edit your security group to allow ingress 4000 from 0.0.0.0/0.

Install Docker on Ubuntu 20.04 LTS

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Here’s the script how to install Docker on Ubuntu 20.04 LTS.

#!/bin/bash
sudo apt-get update
# install dependencies
sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common
# add the gpg key for docker
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
# add the repository in the Linux mint 20
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(. /etc/os-release; echo "$UBUNTU_CODENAME") stable"
sudo apt-get update
# install docker e docker-compose
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(. /etc/os-release; echo "$UBUNTU_CODENAME") stable"
sudo apt-get -y install docker-ce docker-compose
# add the user system to sudo group, no sudo command
sudo usermod -aG docker $USER
# prints docker version =)
docker --version

Yum localinstall

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Here’s how to install a RPM locally. Download the RPM first.

wget https://domain.com/path/to/file/rpmfile1.rpm
wget https://domain.com/path/to/file/rpmfile2.rpm

Then install RPM from a local file.

yum localinstall /path/to/rpmfile1.rpm
yum localinstall /path/to/rpmfile2.rpm

AWS CLI V2

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How to install AWS CLI version 2.

curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install

Nmap

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Here’s how to list all the devices on your network using nmap.

nmap -sn 192.168.0.0/24

If nmap is not installed, install it.

yum install nmap
apt install nmap

List Available PHP Modules

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Here’s how to list the available PHP modules.

apt-cache search php- | less

To get details about a module.

apt-cache show php-curl

To install a module.

apt install php-curl

Or install all modules.

apt install php*

Restart Apache after each install.

systemctl restart apache2

Install Go on Linux Mint 19.3

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Here’s how to install Go on Ubuntu Linux Mint 19.3.

Download the latest from https://golang.org/dl/.

wget https://dl.google.com/go/go1.13.linux-amd64.tar.gz

Check the checksum.

sha256sum go1.13.linux-amd64.tar.gz

Extract the Go tarball to the /usr/local directory.

sudo tar -C /usr/local -xzf go1.13.linux-amd64.tar.gz

Edit your Bash profile to add Go’s path.

cd ~
vim ~/.profile
# Add Go's path
export PATH=$PATH:/usr/local/go/bin
# Load the profile
source ~/.profile

Check if Go is installed.

go version

Output.

go version go1.13 linux/amd64

Tasksel Lampserver

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Tasksel is a Debian/Ubuntu tool that installs multiple related packages as a co-ordinated “task” onto your system. It’s similar to meta-packages where tasks are dericed from from Ubuntu package managers like Synaptic or KPackageKit.

Here’s a quickway to install a lamp server.

# install tasksel first if you don't have it.
apt install tasksel
# install a lamp server package
tasksel install lamp-server

Google SDK Install on Debian or Ubuntu

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Here’s the script.

echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] \
  https://packages.cloud.google.com/apt cloud-sdk main" | \
  sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
sudo apt-get install apt-transport-https ca-certificates
sudo curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | \
  sudo apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
sudo apt-get update && sudo apt-get install google-cloud-sdk

XCode after Catalina Upgrade

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I tried running git after the Mac OS Catalina upgrade and got this error.

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools),
missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

Here’s the fix. For some very odd reason, Apple does not automatically reinstall xcode after each Mac OS upgrade.

You will need to either reset it or install it again.

# Try reset first
xcode-select --reset
# Or install it if reset doesn't work
xcode-select --install

Close your terminal, and reopen and run git again.