# Restarting apps

## Not-particularly-recommended path

The normal route for this is `fly apps restart $APP_NAME`.

This works, but (as of this writing) it restarts Fly machines in serial — and the restart sequence halts if any machine fails to restart normally. (This stuff is documented in [Rough edges](/technical/fly/rough-edges.md).)

## Recommended path

This command generates restart commands. If you copy and execute its output, you'll restart all of an app's Fly machines individually and in parallel. **Watch for failures — it's on you to address them.**

```
fly m list -q -a $APP | awk NF | awk '{ print "fly m restart " $1 " &;" }'
```

Or, because Isaac just found out about [pbcopy](https://ss64.com/mac/pbcopy.html):

```
 fly m list -q -a $APP | awk NF | awk '{ print "fly m restart " $1 " &;" }' | pbcopy
```

I couldn't get the above to work while also showing status/results of each restart, so this is Jed's version of it:

```
fly m list -q -a $APP | xargs -P500 -n1 fly m restart
```

### Filtering by process group

```
fly m list -a $APP | grep $GROUP | awk NF | awk '{ print "fly m restart " $1 " &;" }'
```


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