reptyr: Move a Running Process Into tmux After Forgetting to Start It

Originally published at recca0120.github.io You SSH'd in and started a job that will run for hours. No tmux. No nohup. Now you need to leave, and closing the window kills the process. reptyr moves it into tmux so you can disconnect safely. What reptyr Does reptyr uses the ptrace syscall to re-attach a running process to a new terminal. It genuinely changes the process's controlling terminal — not just redirecting I/O. That distinction matters. Old gdb -based scripts like "screenify" can do somet