fsfreeze(8) on Linux
The text 71f4dfa20a3b, as Debian 11 (Bullseye) shipped it.
suspend access to a filesystem (Ext3/4, ReiserFS, JFS, XFS)
Flags it lists
-
--freeze -
--help -
--unfreeze -
--version -
-V -
-f -
-h -
-u