Kill Old Tmux Sessions

kill-old-tmux-sessions.sh

# this script lists old tmux sessions and kills them to free up resources
TOO_OLD_THRESHOLD_SECS=604800 # 7 days

NOW=$((`date +%s`))

tmux ls -F '#{session_name} #{session_activity}' | while read -r LINE; do
  SESSION_NAME=$(echo $LINE | awk '{print $1}')
  LAST_ACTIVITY=$(echo $LINE | awk '{print $2}')
  LAST_ACTIVITY_SECS_ELAPSED=$(($NOW - $LAST_ACTIVITY))

  if [[ "$LAST_ACTIVITY_SECS_ELAPSED" -gt "$TOO_OLD_THRESHOLD_SECS" ]]; then
    echo "${SESSION_NAME} is ${LAST_ACTIVITY_SECS_ELAPSED}s inactive, killing..."
    tmux kill-session -t ${SESSION_NAME}
  fi
done