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How can I move a process into the background and also silence its output?

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linux-howto

http://unix.stackexchange.com – Say I start a process in the terminal and it sends output to standard error while it runs. I want to move the process into the background and also silence it at the same time. Is there a way to do this without stopping the process and starting it again using & and > /dev/null 2>&1 ? I'm wondering if there is some command that performs bg and can change the output descriptors of the target process too. (HowTos)