Bash Script Testing with Bats: Complete Beginner's Guide

Sat, 25 Oct 2025 12:55:12 +0200

One of the pillars of programming is testing the code. Most of the time, I wrote simple bash scripts without tests(bruh, but why waste time writing tests for couple of lines, right?).

But recently I started developing a Go app with bash support, so it’s time to explore testing suites for bash.

I found BATS (Bash Automated Testing System) and I think I don’t need to look further. It is simple to understand, with support for assertions, custom helpers, and more.

How to encrypt and decrypt files with AES-256 with OpenSSL

Thu, 28 Nov 2024 00:00:00 +0000

The worst nightmare is sending and storing sensitive or private data in plain text.

Let’s improve that by encrypting the files with AES-256.

Install OpenSSL

# Let's check if we have OpenSSL installed
openssl version

# If not, let's install openssl
sudo apt update && apt install openssl -y

Encrypt File

# create a file with some content
echo "hello" > test.txt

# Encrypt the file
openssl enc -aes-256-cbc -salt -pbkdf2 -iter 100000 -in test.txt -out example.enc

#### help ################################################################
# -salt     - Ensures that the same plaintext encrypted multiple 
#             times with the same key produces different ciphertexts
# -pbkdf2   - Password-Based Key Derivation Function 2 
#             algorithm used to derive the encryption key from a password
# -iter     - Specifies the number of iterations for the algorithm
##########################################################################

# check if we have encrypted file
ls
# test.txt example.enc

# let's see the contents of encrypted file
cat example.enc
# Salted__�!ei��/�+�΀O��l3%

Yay, no one can read that.

Bash on Matus Stafura

Bash Script Testing with Bats: Complete Beginner's Guide

How to encrypt and decrypt files with AES-256 with OpenSSL

Install OpenSSL

Encrypt File