UPDATE 8
NAME
update - periodically write the buffer cache to disk
SYNOPSIS
update
\\\$1\ \\$2 ..
20 \\\$1\ # \\$2 ..
EXAMPLES
20 update & # Start a process that flushes the cache
DESCRIPTION
When the system is booted, update is started up in the background from /etc/rc to issue a SYNC system call every 30 sec.
"SEE ALSO"
boot (8).