Do this: $ git rev-parse HEAD This gives you the full commit id, for the short id, run this: $ git rev-parse –short HEAD I work as a freelancer, so if you don’t want to do that kind of things… Read More
How to create a Let’s Encrypt SSL certificate using DNS challenge?
First of all, register the domain name if not done already. Then run the steps: $ sudo certbot -d YOUR.DOMAIN.COM –manual –preferred-challenges dns certonly When prompted, create the required TXT record with your DNS provider and press enter in certbot.
How to link Atom and GitHub
Follow the steps: Start Atom Select menu item `View -> Toggle Command Palette` Search for “clone” Select “GitHub: Clone” Enter the URL of the GitHub project you want to clone Click “Clone” To know the URL to use, go to… Read More
How to create a virtual environment in Python3?
Install whatever Python3 package you want for your OS, along with pip. For example for Ubuntu: $ sudo apt update $ sudo apt install python3.7 python3-pip Go into a directory you want to use as a base and run the… Read More
How to install and configure OpenVPN on Amazon Linux?
Important note: What I wrote here will not work on Amazon Linux 2; only on Amazon Linux. There are some rare tutorials on the net, like this outdated one. Save yourself some headaches and use the following script to easily… Read More
How to install and configure AWS CloudWatch agent on Ubuntu?
I will assume that you want to install the CloudWatch agent on an EC2 instance. I took the example of sending Apache logs to CloudWatch Logs. First, make sure your EC2 instance has an IAM role attached with the CloudWatchAgentServerPolicy… Read More
How to convert Maildir to mbox?
Make sure you have the procmail package installed, and then run the following: $ for i in MAILDIR/cur/*; do formail -I "Status: RO" < "$i" >> MBOX; done I work as a freelancer, so if you don’t want to do… Read More
How to show the disk space used by MySQL tables?
Connect to your MySQL server and run the following: mysql> select table_name, round(((data_length + index_length) / (1024 * 1024)), 2) as `Size in MB` from information_schema.tables where table_schema = ‘YOUR_DB_NAME’ order by `Size in MB`; I work as a freelancer,… Read More