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What exactly does this command do, in regards to running a Rails server?

~$ sudo touch restart.txt

I thought it restarts the Rails server, but it happens so fast when I run it, that I can hardly believe it's really rebooting the Rails server. It's fixed my problem a bunch of times, but I would like to know why it works, and what it's doing.


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up vote 5 down vote accepted

If you are using Passenger, then it's monitoring the timestamp of the tmp/restart.txt file to trigger restarts.

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ahh, so passenger is looking at it and when it sees a newer timestamp, it knows to restart itself? – Goldentoa11 May 11 '12 at 18:58
@Goldentoa11 yes. – whitequark May 11 '12 at 19:04

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