重定向nohup stdout并刷新

Question

I want to use nohup and redirect stdout to a file but I do not need a archive I just want to be able to interactively view the current stdout. I am thinking I can redirect the stdout to a file to for it to be flushed after each output

??? nohup ruby myapp.rb > output.log &

interactly view the output tail -F ./output.log

Answer 1

You'll need to take a look at my answer to another question here: Linux non-blocking fifo (on demand logging) .

Assuming that by now you've got the ftee program ready, if you call your app like this:

$ mkfifo /tmp/mylog

$ nohup ruby myapp.rb 2>&1 | tee output.log | ftee /tmp/mylog &

you'll get:

• full output log int the file output.log
• current output of your app available on demand via the /tmp/mylog fifo

Now if you want to just take a peek at your prog's latest output do:

$ cat /tmp/mylog

Hope this helps.