update(8)

NAME

update - periodically flush filesystem buffers.

SYNOPSIS

update [ options ]

DESCRIPTION

The update daemon flushes the filesystem buffers at a reg
ular interval. It has two modes of operation. By default
it will wake up every 5 seconds and flush some dirty
buffers. Newer kernels do not need a user space update
daemon. This is automatically detected by update which will simply exit. The traditional behavior of waking up
every 30 seconds to call sync(2) be forced with an option
if it is deemed necessary.

The following options are accepted by update:

-S, --use-sync

Use the traditional behavior of calling sync(2).

-s, --sync-interval secs

If using sync, wake up and call it every secs sec
onds. The default is every 30 seconds.

-f, --flush-interval secs

Unless using sync, wake up and flush some buffers
every secs seconds. The default is every 5 seconds.

--help Print a usage message on standard output and exit

successfully.

--version

Print version information on standard output then
exit successfully.

update should be started as early as possible during the boot process. If it is invoked by a non-privileged user,
it calls sync and exits.

SEE ALSO

init(8), sync(2), sync(8)

AUTHOR

Torsten Poulin <torsten@diku.dk>

Linux 2.2 May 24, 1999 UPDATE(8)