General Commands Manual
NAME nice — execute a utility with an altered scheduling priority
[-n increment] utility [argument ...]
at an altered scheduling priority. If an increment
is given, it is used; otherwise an increment of 10 is assumed. The super-user can run utilities with priorities higher than normal by using a negative increment
. The priority can be adjusted over a range of -20 (the highest) to 20 (the lowest). A priority of 19 or 20 will prevent a process from taking any cycles from others at nice 0 or better.
A positive or negative decimal integer used to modify the system scheduling priority of utility.
utility exits with one of the following values:
An error occurred in the nice utility.
The utility was found but could not be invoked.
The utility could not be found.
Otherwise, the exit status of nice will be that of utility.
COMPATIBILITY The historic -increment option has been deprecated but is still supported in this implementation.
STANDARDS The nice utility conforms to IEEE Std 1003.2-1992 (“POSIX.2”).
HISTORY A nice utility appeared in Version 6 AT&T UNIX.
is built into csh(1)
with a slightly different syntax than described here. The form ‘
’ nices to positive nice, and ‘
’ can be used by the super-user to give a process more of the processor.