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This question already has an answer here:

nohub and & seem to have a similar effect on the surface, they both start processes without occupying the shell from which they have been started, how do they differ on a deeper level?

marked as duplicate by Costas, Anthon, jimmij, slm Feb 12 '15 at 0:33

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Nohup

  • command will be immune to hangup signals
  • Runs without a tty

nohup - run a command immune to hangups, with output to a non-tty

&

  • Command is placed in the backgroud
  • You can still get back to the command (from same shell) using 'fg'

If a command is followed by a & and job control is not active, the default standard input for the command is the empty file /dev/null. Otherwise, the invoked command inherits the file descriptors of the calling shell as modified by redirections

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