Simple shell script to backup MySQL databases

#!/bin/bash
# Simple script to backup MySQL databases

# Parent backup directory
backup_parent_dir="/var/backups/mysql"

# MySQL settings
mysql_user="root"
mysql_password=""

# Read MySQL password from stdin if empty
if [ -z "${mysql_password}" ]; then
  echo -n "Enter MySQL ${mysql_user} password: "
  read -s mysql_password
  echo
fi

How to Redirect Nginx traffic based on the Client’s IP Address

Sometimes developers need to redirect part of their traffic to another web area or specific URL. Depending on the IP address the visitors have, it’s ideal to geo-locate traffic or simply protect areas from unwanted specific IP addresses. So, how do you redirect traffic from IP 1.2.3.4 to http://www.thisurl.com/page2.html and the rest of the traffic to http://www.thisurl.com/? We’ll go over this today.

Redirect using Nginx HttpAccessModule

As Nginx supports conditional configurations, first let’s look at an example of how to redirect traffic using HttpAccessModule running a regex against $remote_addr variable.

server {
if ($remote_addr = 1.2.3.4) {
rewrite ^ http://www.yourwebsite.com/otherpage.htm;
}
}

In this example, 1.2.3.4 is the IP address you want to redirect.