https://kb.synology.com/en-nz/C2/tutorial/Hybrid_Share_global_file_locking
Use global file locking to prevent editing conflicts - Synology Knowledge Center
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global file lockinguse
https://manpages.ubuntu.com/manpages/resolute/man8/lat_fcntl.8.html
Ubuntu Manpage: lat_fcntl - fcntl file locking benchmark
fcntl file locking benchmark
file lockingubuntumanpagelatfcntl
https://www.mycyberuniverse.com/mac-os/modify-or-disable-mac-os-x-lion-s-file-locking-feature
Modify or disable Mac OS X Lion’s file locking feature
May 7, 2015 - Whenever you try to modify a file that you have not touched in over two weeks, you’ll receive the following…
mac os xfile lockingmodifydisablefeature
https://tug.org/pipermail/tex-live/2009-January/019752.html
[tex-live] Solution to the file locking problem during update - take 2
tex liveto thefile locking
https://www.tlbox.com/tag/locking-steel-security-file-box/
Locking Steel Security File Box Archives - Tool Box
file boxlockingsteelsecurityarchives