Merge pull request #18704 from keszybz/fallback-hostame-override

[thirdparty/systemd.git] / docs / ENVIRONMENT.md

diff --git a/docs/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index 7eec45593464f16dde61719a022e2c214dc756a8..a3916f8cde0e427509252e9b1dce2027cab2b3fe 100644 (file)
--- a/docs/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
@@ -56,6 +56,10 @@ All tools:
 * `$SYSTEMD_EFI_OPTIONS` — if set, used instead of the string in the
   `SystemdOptions` EFI variable. Analogous to `$SYSTEMD_PROC_CMDLINE`.
 
+* `$SYSTEMD_DEFAULT_HOSTNAME` — override the compiled-in fallback hostname
+  (relevant in particular for the system manager and `systemd-hostnamed`).
+  Must be a valid hostname (either a single label or a FQDN).
+
 * `$SYSTEMD_IN_INITRD=[auto|lenient|0|1]` — if set, specifies initrd detection
   method. Defaults to `auto`. Behavior is defined as follows:
   `auto`: Checks if `/etc/initrd-release` exists, and a temporary fs is mounted