A Slatepencil Documentation website

a site to keep notes of things.

Nillius in Verba

Stay hungry, Stay foolish

To progress and to revive

Efficiency: env » direction » methods » strength & courage

Directory

• Artifical Intelligence
• Electronic Engineering and Computer Science
• Internet of things
• Languages
• Linux
• Matemática
• Miscellaneous

Languages

LINK	LINK	LINK	LINK
Markdown	English	French
Python	CMD	Power Shell	Javascript
C	OpenGL	CMake

Linux

LINK	LINK	LINK	LINK
Network	UFW	GIT	Docker
Kubenetes	SSL	SSH

IOT

LINK	LINK	LINK	LINK
AT89S52RC	Arduino	ESP32	Exynos

Useful Sources

LINK	LINK	LINK	LINK	LINK
W3C	MDN	Gutenberg	DNS Check	Game Tester
LibriVox	GLM	OpenLibrary	Game Assets 1	Game Assets 2

Miscellaneous

• To find the SHA-256 checksum

shasum -a 256 /path/to/file
# md5
md5sum /path/to/file
# sha1
## Print or check SHA1 (160-bit) checksums. With no FILE, or when FILE is -, read standard input.
sha1sum {file}
# Checksums (IEEE Ethernet CRC-32) and count the bytes in a file
cksum README.md
# intergrity
openssl dgst -sha384 -binary bootstrap.min.css | openssl base64 -A
# QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH
# <link rel="stylesheet" href="https://example.com/dependencies/bootstrap/5.3.3/bootstrap.min.css" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
# base64 encode file
openssl base64 -in <infile>

# decode
echo "encoded_string" | base64 --decode

Verify Checksum on Windows

• certutil -hashfile example_file.txt MD5
• certutil -hashfile example_file.txt SHA1
• certutil -hashfile example_file.txt SHA256