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Xdebug + Docker Step Debugging Setup
Note: I noticed that some of the steps are redundant. I will update this post from time to time to remove the redundant parts. Requirements The steps should be similar (if not identical) on different…
First screw up as a sysadmin: disk destroyer
Who doesn’t like a good tale of a system administrator screwing up production, right? Well, this is the story of how I screwed up our SolusVM KVM Slave due to a silly mistake. The company…
How to fix “apt-key is deprecated. Manage keyring files in trusted.gpg.d instead”
There are many ways to install a software in Linux such as building from source, downloading a deb package, and installing from a package manager. I like the last approach the most due to it’s…
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Having Fun With Misconfigured Virtual Hosts
I had too much time on my hand a few weeks ago, so I decided to play around with Shodan to find some juicy stuff. Specifically, exposed directory listing that contain bash history, environment variables…
My Linux Journey – Backing up files from VirtualBox VM
I recently bought a new (used) PC. After a few months, I decided to install a new SSD and put Linux inside it. So far so good, but I faced an issue – I wanted…
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Laravel Sail: Your Composer dependencies require a PHP version “>= 8.0.0”. You are running 7.4.x
I was trying to create a new Laravel project when this error appeared in my terminal. The PHP process inside the container keeps restarting because of this error. How to reproduce? $ curl -s “https://laravel.build/example-app?with=mysql,redis,mailhog”…
I got an invitation to Google FooBar!
I’ve been polishing my Java skills on https://codingbat.com/ for the past day when this black box appeared in my search result. Fascinating! They gave me an invitation even when I cannot rattle off the methods…
Wargames.my 2020 write-up: misc – defuse the bomb
First, list the content of the zip file $ unzip -vl bomb.zip Notice that one of the CRC32 value is different. We need to extract that single file. $ unzip bomb.zip 7.zip Next, repeat the…
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Wargames.my 2020 write-up: cryptography (all)
1. Babyrsa Unfortunately, I don’t know how the math in this challenge works. I used RsaCtfTool to solve this challenge 2. Long Crypto Guessing This challenge uses the Linear Congruential Generators (LCG) algorithm to generate…