Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Julia Evans @b0rk@jvns.ca

3/27/2025, 6:59:51 PM

Public

escape codes

Panel 1: a program's input and outputs are streams of bytes

everything you type goes into standard input

all the output you see comes from either
standard output or standard error

your terminal emulator can only communicate with programs by reading/writing bytes

panel 2: some inputs/outputs are text and some are special instructions

in: mouse position, ctrl+left arrow
out: make text green, make cursor invisible

panel 3: these special instructions are called "escape codes"

they're called "escape codes" because they all start with the ESC character

panel 4: example: how colours get set

program: “^[[31m”

Terminal emulator: “ok, I'll make text red from now on!!”

(there are also codes for bold, underline, background colour)

panel 5: programs can easily "break" your terminal by printing escape codes

program: “oops I made your cursor disappear”

It's easy to fix though, run reset to print a special escape code that resets everything

It's easy to fix though, run reset to print a special escape code that resets everything

If you have a fediverse account, you can quote this note from your own instance. Search https://social.jvns.ca/users/b0rk/statuses/114235932090758609 on your instance and quote it. (Note that quoting is not supported in Mastodon.)