trying to capture javac output in bash shell

I'm trying to redirect the java compiler output to a file. I thought it's supposed to be:

javac > log.txt

or something. Instead, I see all the output on the terminal and nothing in log.txt!

Also, if I want to log errors too, do I do

javac 2>&1 > log.txt



javac 2> log.txt

The reason is that you have two output file descriptors instead of one. The usual one is stdout, which you can redirect with > and it's supposed to be used for resulting output. The second one, stderr, is meant for human readable output like warnings, errors, current status etc., this one is redirected with 2>.

Your second line, using 2>&1, redirects stderr to stdout and finally stdout into log.txt.

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