2.6Background Processes

# Run a process in the background
node server.js &
# Output: [1] 1234 (job number and PID)

# List background jobs
jobs
# [1]+  Running  node server.js &

# Bring a background job to foreground
fg %1

# Send a running foreground process to background
# Press Ctrl+Z (suspends the process)
bg %1  # Resume it in the background

# Run a process that survives terminal disconnect
nohup node server.js > server.log 2>&1 &
# Output goes to server.log, process continues even if you close the terminal