fsfreeze(8) on Linux
The text 30ea8b2d7c2a, as Debian 12 (Bookworm) shipped it.
suspend access to a filesystem (Ext3/4, ReiserFS, JFS, XFS)
Flags it lists
-
--freeze -
--help -
--unfreeze -
--version -
-V -
-f -
-h -
-u