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(sh-utils.info)nice invocation

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`nice': Run a command with modified scheduling priority
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   `nice' prints or modifies the scheduling priority of a job.
Synopsis:

     nice [OPTION]... [COMMAND [ARG]...]

   If no arguments are given, `nice' prints the current scheduling
priority, which it inherited.  Otherwise, `nice' runs the given COMMAND
with its scheduling priority adjusted.  If no ADJUSTMENT is given, the
priority of the command is incremented by 10.  You must have
appropriate privileges to specify a negative adjustment.  The priority
can be adjusted by `nice' over the range of -20 (the highest priority)
to 19 (the lowest).

   Because most shells have a built-in command by the same name, using
the unadorned command name in a script or interactively may get you
different functionality than that described here.

   The program accepts the following option.  Also see Note: Common
options.

`-n ADJUSTMENT'
`-ADJUSTMENT'
`--adjustment=ADJUSTMENT'
     Add ADJUSTMENT instead of 10 to the command's priority.