DEV Community: Adetunji Ojekunle

You want to clone a specific commit - git

Adetunji Ojekunle — Thu, 01 May 2025 11:30:00 +0000

So you want to git clone a specific commit, but you can't really do that for now (tell me if you have a different way). There's a clever work around I use;

Clone the entire repo
git reset --hard [commit-id]| [commit-id] will be the specific commit you are interested in, I assume you know the specific commit either by looking at the commit history or just do git log.

The difference between a Virtual Machine (VM) and a Container

Adetunji Ojekunle — Tue, 19 Apr 2022 15:25:24 +0000

They are two ways to deploy multiple, isolated services on a single platform

The Difference

VM's

VM's have an hypervisor managing the resources in connecting to the main physical machine
Multiple machine with multiple OS's can run separately in isolation

Pros

System reliability: host OS wont be affected even if it crashes because of isolation.
Provides layer of security, even if infected by some malware. Host OS will not be affected
Multiple OS environment running on the system.

Cons

Running multiple os's can lead to instability
Less efficient
Can be infected with the weakness of the Host Os

Containers

Key: There are exceptionally lightweight.
A form of operating system virtualization.

An Abstraction of the app layer that package the code and dependencies together

They can share The host OS kernel, libraries and binaries too

Pros

Extremely Lightweight and fast
Exemplary when it comes to CI?C implementation

Cons

depends on the Host OS
Cannot all by themselves provide security at a commendable level.
When a container is deleted, if the data inside is lost. You will have to add Data volumes in order to store the data.

Major Difference: Vm's Hypervisor virtualizes the physical
hardware, Each VM contains a guest OS, a virtual copy of the
hardware the oS requires to run WHILE a container
virtualizes the OS and only contains the application and it
libraries.

Making a zsh script

Adetunji Ojekunle — Mon, 10 May 2021 00:05:37 +0000

Background:

I have been making small notes about my learnings daily, typically any new thing I learnt. I make a small note about it.
I want to name this note with dates and time(This is for easy find, recollection etc) but I need to also get the date in this format 20210510002211

-- Now, the terminal will readily spew out this date formate with this command
date +%Y%m%d%H%M%S * - try it.*

-- Now I can't keep that in the terminal, hence why i need to make it into a script. give it a fancy name and run quick
What do you need:

-A text editor(I use nano here)

Create a file

#!/bin/bash
# A script that spews out current long date and time
date  +%Y%m%d%H%M%S

save the file giving it a fancy name (datum)

Setting Permission

chmod 755 datum       //datum is the fancy name  I'm calling the script

--- The script can run now, try./datum`

Putting it in my own path
Run echo PATH
-- It should reveal a the current excutable path on the system
-- It is good practice to have a special folder for your scripts /bin, create that folder on your home directory.
Now you will have a this pathe ./bin/datum
We need to add the new path to PATH definition on the .zshsrc file
do nano ~/.zshsrc - You will be able to edit that file now, add the path to the script to the PATH line
save and exit
Now, we need to refresh the zsh files
do source .zshsrc

Now, just typing datum in the terminal should spit out that long date and time

Installing Docker on MacOS

Adetunji Ojekunle — Sun, 09 May 2021 08:50:23 +0000

Background
-I had issues installing Docker so Looked up how to do it via shell [I used the *Brew package installer], I added a more in depth reference below.

Update Brew brew update
Install doker brew install docker
Install docker machine brew install docker-machine
Install virtualbox brew install --cask virtualbox

....You might run into issues running the 4th command

You will have to allow software installation from Oracle blah-blah-blah in your System Preference. Chances are your sytem will pop out that information for you and then do a restart.

**Everything about docker and it's environment is set up already

(More depth follow through)[https://www.robinwieruch.de/docker-macos]