Continually output file content to console?

Quick question, hopefully... I'm building an application with a fairly extensive log file. I'd like the ability at any time to monitor what a specific instance of my application is doing. I could open and close the log file a bunch of times, but its kind of a pain. Optimally, as lines are written to the log file, they would be written to the console as well. So I'm hoping something along the lines of "cat" exists that 开发者_Python百科will actually block and wait for more content to be available in the input file. Anyone have any ideas?

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tail -f logfile

this will keep it open and 'follow' the new output.

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tail -f yourlogfile

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tail -f logfile

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An alternate answer for variety: If you're already looking at the log file with less, press capital F to get it to do the same thing tail -f does: wait for new content to be appended and show it.

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Look at tee utility

http://www.devdaily.com/blog/post/linux-unix/use-unix-linux-tee-command-send-output-two-or-more-directions-a