sleep(1) vs. sync(1) twice before umount(8)

[David Christensen <dpchrist@holgerdanske.com>]

On 7/10/22 05:55, fxkl47BF@protonmail.com wrote:
> I'm just flapping my gums
> As a systems administrator for UNIX systems I wrote more than a few 
scripts
> Many time I found it necessary to put a sleep between operations

+1


The hard part is deciding what the NUMBER argument should be.  :-/


> Several decades ago I was taught to type sync and then type sync 
again before unmounting a drive
> The only reason I ever got was that the second sync was a time delay


That is an interesting technique.  I sometimes type sync(1) twice when I 
am distracted with several irons in the fire and/or when the system is 
making me worried, but it is not my standard practice.


Any potential gotchas?


David