---
title: ssh
date: 2023-11-23
---

forward port
------------

How to forward local port 8385 to remote port 8384

```bash
ssh  -L 8385:localhost:8384 remote
```

close ControlPersist sessions
-----------------------------

The `-O` flag controls an active connection multiplexing master process.

Valid commands are:
* **check:** check that the master process is running
* **forward:** request forwardings without command execution
* **cancel:** cancel forwardings
* **exit:** request the master to exit
* **stop:** request the master to stop accepting further multiplexing requests

Either *exit* or *stop* should work.

```bash
ssh -O stop server
```
or

```bash
ssh -O exit server
```