daubac402

UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

daubac402

#!/bin/bash
# Sometimes you need to move your existing git repository
# to a new remote repository (/new remote origin).
# Here are a simple and quick steps that does exactly this.
#
# Let's assume we call "old repo" the repository you wish
# to move, and "new repo" the one you wish to move to.
#
### Step 1. Make sure you have a local copy of all "old repo"
### branches and tags.

daubac402

# vim /etc/yum.repos.d/CentOS-Base.repo
# Because mirror.centos.org now doesn't support CentOS, we use vault.centos.org instead

# Change version "6.4" with your CentOS 6.x version: rpm -q centos-release
# Some old CentOS 6 server has old SSL so that it can't connect to https site, so need to add: "sslverify=0"

[base]
name=CentOS-$releasever - Base
baseurl=https://vault.centos.org/6.4/os/$basearch/
gpgcheck=1

daubac402

$ MYDOMAIN=yourdomain.com
$ mkdir -p /etc/mail/dkim-keys/$MYDOMAIN
$ cd /etc/mail/dkim-keys/$MYDOMAIN
$ opendkim-genkey -t -s mail -d $MYDOMAIN

# if opendkim-genkey command is not found, install it#
# Eg: With Centos 7:
$ rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
$ sudo yum install -y opendkim

daubac402

# Check current partitions status
lsblk

# Expand /dev/xvda from 8GB (default) to your current EBS size (please increase your EBS volume in AWS Console then run these below commands)
sudo yum install -y epel-release
sudo yum install -y cloud-utils-growpart
growpart /dev/xvda 1
reboot

# Make an Amazon EBS volume available for use on Linux (for eg: /dev/xvdb)

daubac402

In production, it is recommended to minify any JavaScript code that is included with your application. Minification can help your website load several times faster, especially as the size of your JavaScript source code grows.

Here's one way to set it up:

1. Install Node.js
2. Run npm init -y in your project folder (don't skip this step!)
3. Run npm install terser

Now, to minify a file called like_button.js, run in the terminal:

daubac402

1. Create Root CA (Done once)

1.1. Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

daubac402

$ sudo useradd new_user
$ sudo passwd new_user

# Create new_user key pair, then add public key into that user's authorized_keys
$ sudo mkdir /home/new_user/.ssh/
$ sudo vim /home/new_user/.ssh/authorized_keys

# And permission
$ sudo chown new_user:new_user -R /home/new_user/
$ sudo chmod 700 /home/new_user/.ssh/

daubac402

# Let’s say you want to allow the user to run sudo commands without being asked for a password

# Login as root
$ su

# Edit /etc/sudoers
$ visudo

# Add this line to the last, with username is the username that you want to add to sudoers, then save (:wq)
username ALL=(ALL) NOPASSWD:ALL

daubac402

# You will connect to the internet through a 3rd server (using SSH Tunneling)
# And of course, this 3rd server needs to connect to the Internet freedomly!

sudo apt-get install tsocks

sudo vim /etc/tsocks.conf
Change near the end of file to:
server = 127.0.0.1
server_port = 1080