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

4/2/2025, 7:33:48 PM

Public

every core unix command I use

https://wizardzines.com/comics/every-core-unix-program-i-use/

## basic file stuff

touch - create file
mkdir - create directory
cp - copy
mv - move
rm - delete
ln - create symlink
ls - list directory

## how big is it
wc - word count
du - file size in bytes
df - filesystem usage

## slice & dice files
sed - replace regex
tr - replace character
grep - search file
cut - get column
awk - get column (+ more)
sort - sort lines
uniq - unique lines
head - first 10 lines
tail - last 10 lines

## filesystems
mount - mount a filesystem
umount - unmount
dd - copy data to a disk

## manage processes
ps - list processes
lsof - list open files
kill - send a signal
pkill - fancy `kill`
top - who's using CPU?
uptime - time since reboot

## permissions
chown - change owner
chmod - change permissions

## time stuff
time - measure runtime
date - current time
sleep - wait X seconds
cal - cute calendar

## useful with pipes
less - scroll text
cat - print file contents
tee - stdin -> file + stdout
xargs - run cmd for each line
find - find files by name

## compression
tar - make/extract tar files
gzip - compress with gzip
gunzip - decompress
zip - compress with zip
unzip - decompress

## & more
which - find cmd on PATH
man - read man page
crontab - edit crontab
md5sum - calculate md5sum
diff - diff files

280

If you have a fediverse account, you can quote this note from your own instance. Search https://social.jvns.ca/users/b0rk/statuses/114270039474454095 on your instance and quote it. (Note that quoting is not supported in Mastodon.)