sync(1M)                                                           sync(1M)




 NAME    [Toc]    [Back]
      sync - synchronize file systems

 SYNOPSIS    [Toc]    [Back]
      sync [-l]

 DESCRIPTION    [Toc]    [Back]
      sync executes the sync() system call (see sync(2)).  If the system is
      to be stopped, the sync command must be called to ensure file system
      integrity.

      sync flushes all previously unwritten system buffers including
      modified super blocks, modified inodes, and delayed block I/O out to
      disk.  This ensures that all file modifications are properly saved
      before performing a critical operation such as a system shutdown.  For
      additional protection from power failures or possible system crashes,
      use syncer to execute sync automatically at periodic intervals (see
      syncer(1M)).

 AUTHOR    [Toc]    [Back]
      sync was developed by AT&T and HP.

 SEE ALSO    [Toc]    [Back]
      syncer(1M), sync(2).

 STANDARDS CONFORMANCE    [Toc]    [Back]
      sync: SVID2, SVID3


 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003