Unix - kdaisho/Blog GitHub Wiki

• sed
• Unix Command Cheatsheet

Fold

Wraps input text to a specified width.

git log | fold -sw 5 | head -n 10

# commit 
# a50a50f989
# d3fae6288d
# dc9115d094
# a9d8d2e32f
# Author: 
# Daisho 
# Komiyama 
# <daishokom
# iyama@gmai

-s: Break lines at spaces whenever possible (soft wrapping). Without this, fold might split a word in the middle.

List in 1 column

ls -1

# output
README.md
apps
docker-compose.yml
node_modules
package.json
...

Backticks, Parenthesis

echo `date`

# output
Wed Nov 27 21:04:41 EST 2024

echo $(date)

# output
Wed Nov 27 21:04:41 EST 2024

echo some long data > blah-`date +%F`.log # or blah-$(date +%F).log

# creates a file with the content
blah-2024-11-27.log