# GNU screen commands

`GNU screen` commands:

`# Start a new anonymous screen session
screen

# List existing session PIDs
screen -ls

# Attach to a specific session by PID
screen -Dr <PID>

# Attach to one existing session (only if exactly one session exists)
screen -Dr

# Detach (while attached)
Ctrl+a - d

# Split panes (while attached)
Ctrl+a S     # horizontal split
Ctrl+a |     # vertical split
Ctrl+a Tab   # move between panes
`