How to restart a service running in docker compose

I’m playing with docker-compose for a test Flask app. My docker-compose.yml looks like this: I noticed any change I made in my files within my templates folder did not take effect when I reloaded the browser locally at localhost:5000 So, I found that I can just restart the ‘www’ service defined on my docker-compose.yml file […]

Connect to a remote MySQL database using Linux terminal

This is simple. After you setup a user with proper access rights run the below commands. # mysql -u yourUser -p -h <yourHostname or IP> A little explanation: -u tells mysql what your username -p tells mysql you have a password and will prompt you to enter it after you press enter -h tells mysql […]

How to run Ansible when Python not installed on Ubuntu EC2

I started an Ubuntu EC2 the other day hoping to run Ansible on it and was surprised that Python was not installed. A requirement for Ansible to run on target machines is to have a modern version of Python. You can just run sudo apt install python but this is not ideal if you need […]

Breaking Up Long Lines in Your Dockerfile

I try to limit my line characters to 79-80 per line. For example check this 122 character multi-command line: RUN wget -O afile.tar.gz && tar -xvf afile.tar.gz -C /usr/src/myapp && rm afile.tar.gz You will need to scroll horizontally using your text editor to see the super long crazy line. This is not efficient and […]

GREP command overview

The grep command means Global Regular Expression Print. This Linux command is one of the most useful commands out there. Below are some basic examples: grep ‘word’ filenamegrep ‘word’ filename1 filename2 filename3grep ‘string1′ string2’ filenamecat filename | grep ‘something’command | grep ‘something’ Next example, you can search for the user ‘tom’ in the Linux passwd […]

How to change the default SSH port in MacOS using Terminal

This is simple. Open a terminal and follow the steps below. This worked for me on MacOS 10.13.6 Open the Terminal. Run sudo vim /etc/services Enter your password Find the lines assigned to port 22, something like the image below Replace both ports 22 with your desired ssh port using a number between 1024 and […]