Category: System Administration

I use GitBash as my shell on Windows. Below are the scripts I normally load including git ssh agent. Useful git aliases:

Sometimes your website may be making more redirects than necessary to account for https and stripping or adding trailing slash.

Sometimes you need to block access from certain IP addresses to your web site. It is easy to do in .htaccess file if you are running Apache. What if your server is behind a load balancer ? The code below lets you block IP addresses when your server is behind AWS load balancer.

Sometimes I have to go through log files searching for a certain error message. The command below will show you log file names and lines where the message was recorded. grep -rnw ‘logs/’ -e ‘Hello World’ To learn more about “grep” command use the following link https://help.ubuntu.com/community/grep

Recently I got into a situation where I ran out of free space on my Ubuntu instance. The first thing you need to do is to check how much available space you have. The command below will give you the general idea. df -h To list the files/directories that take up most of the space…

I always forget how to do this: find /var/www/html -type d -exec chmod 755 {} \; find /var/www/html -type f -exec chmod 644 {} \;  

To get started let’s spin up an Ubuntu 16.4 LTS instance on AWS.  After instance is up and running, we need to add port 80 to the instance’s security group inbound rules.  There should be at least two ports open: 22, and 80. Now we can ssh into the instance and install Nginx, Node, and…