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docs: Document SYSTEMD_SYSEXT_MUTABLE_MODE env var

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Krzesimir Nowak 2024-03-20 08:34:41 +01:00
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docs/ENVIRONMENT.md
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@ -378,6 +378,13 @@ All tools:
`$SYSTEMD_CONFEXT_HIERARCHIES` works for confext images and supports the
systemd-confext multi-call functionality of sysext.
* `$SYSTEMD_SYSEXT_MUTABLE_MODE` — this variable may be used to override the
default mutability mode for hierarchies managed by `systemd-sysext`. It takes
the same values the `--mutable=` command line switch does. Note that the
command line still overrides the effect of the environment
variable. Similarly, `$SYSTEMD_CONFEXT_MUTABLE_MODE` works for confext images
and supports the systemd-confext multi-call functionality of sysext.
`systemd-tmpfiles`:
* `$SYSTEMD_TMPFILES_FORCE_SUBVOL` — if unset, `v`/`q`/`Q` lines will create