Screen

The last modifications of this post were around 2 years ago, some information may be outdated!

Keep the running tasks on the remote host continue after turning off the local caller.

👉 Other "Shell" notes.

Install

sudo apt install screen # ubuntu

Basic command lines

# check screen version
screen -v

# start new session (with name)
screen -S <name>

# list running sessions
screen -ls

# attach to a running session (without name)
screen -x

# attach to a running session (with name)
screen -rx <name>
# -x for an interactive (scrolling)

# detach a running session
screen -d <name> # or Ctrl + A, D

# kill a session
screen -X -S <name> quit

Delete sessions

1. Reattach first: screen -r <name>
2. Ctrl + A, K then Y

# kill ALL auto-created sesssions
screen -ls | grep pts | cut -d. -f1 | awk '{print $1}' | xargs kill

# kill all detached sessions
screen -ls | grep Detached | cut -d. -f1 | awk '{print $1}' | xargs kill

Create a screen + list of command lines

screen -S 'dat' -dm bash -c 'cd /jekyll-site; bundle exec jekyll serve -I; exec sh'

Hotkeys

• Detach: Ctrl + A, D
• Reattach: Ctrl + A, R
• Kill current session: Ctrl + A, K then Y

Errors

# Cannot make directory '/run/screen': Permission denied
mkdir ~/.screen && chmod 700 ~/.screen
export SCREENDIR=$HOME/.screen
# also add this line to ~/.zshrc or ~/.bashrc

Reference

• Screen Quick Reference