NAME    [Toc]    [Back]

     update - flush internal filesystem caches to disk frequently

SYNOPSIS    [Toc]    [Back]

     update

DESCRIPTION    [Toc]    [Back]

     The  update  command no longer exists, but has been incorporated into the
     kernel where it will flush dirty buffers that have not  been
touched for
     thirty seconds or more.

     The  same  effect  can be obtained by using the sync(8) command, although
     the in-kernel update process will do  this  in  a  staggered
manner.

SEE ALSO    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

     An update command appeared in Version 6 AT&T UNIX.

     The  update  command  was  incorporated  into  the kernel in
OpenBSD 1.2.

BUGS    [Toc]    [Back]

     It is possible on some systems, that a sync(8) occurring simultaneously
     with a crash may cause file system damage.  See fsck(8).

OpenBSD      3.6                           June      8,      1996