Merge pull request #16096 from poettering/journal-hash-fix

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

diff --git a/docs/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index 83c2d251340f04ed813852782cbe086fc1c200fc..d6f5126ac2d1d35e03f4a0c3b34d37cc30eb8040 100644 (file)
--- a/docs/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
@@ -1,5 +1,7 @@
 ---
 title: Known Environment Variables
+category: Interfaces
+layout: default
 ---
 
 # Known Environment Variables
@@ -41,8 +43,14 @@ All tools:
   debugging, in order to test generators and other code against specific kernel
   command lines.
 
-* `$SYSTEMD_EFI_OPTIONS` — if set, used instead of the string in SystemdOptions
-  EFI variable. Analogous to `$SYSTEMD_PROC_CMDLINE`.
+* `$SYSTEMD_FSTAB` — if set, use this path instead of /etc/fstab. Only useful
+  for debugging.
+
+* `$SYSTEMD_CRYPTTAB` — if set, use this path instead of /etc/crypttab. Only
+  useful for debugging. Currently only supported by systemd-cryptsetup-generator.
+
+* `$SYSTEMD_EFI_OPTIONS` — if set, used instead of the string in the
+  SystemdOptions EFI variable. Analogous to `$SYSTEMD_PROC_CMDLINE`.
 
 * `$SYSTEMD_IN_INITRD` — takes a boolean. If set, overrides initrd detection.
   This is useful for debugging and testing initrd-only programs in the main
@@ -61,6 +69,17 @@ All tools:
   this only controls use of Unicode emoji glyphs, and has no effect on other
   Unicode glyphs.
 
+* `$RUNTIME_DIRECTORY` — various tools use this variable to locate the
+  appropriate path under /run. This variable is also set by the manager when
+  RuntimeDirectory= is used, see systemd.exec(5).
+
+* `$SYSTEMD_CRYPT_PREFIX` — if set configures the hash method prefix to use for
+  UNIX crypt() when generating passwords. By default the system's "preferred
+  method" is used, but this can be overridden with this environment
+  variable. Takes a prefix such as `$6$` or `$y$`. (Note that this is only
+  honoured on systems built with libxcrypt and is ignored on systems using
+  glibc's original, internal crypt() implementation.)
+
 systemctl:
 
 * `$SYSTEMCTL_FORCE_BUS=1` — if set, do not connect to PID1's private D-Bus
@@ -126,7 +145,7 @@ systemd-udevd:
   boot loader menu through EFI a file `/run/systemd/reboot-to-boot-loader-menu`
   is created whenever this is requested. The file contains the requested boot
   loader menu timeout in µs, formatted in ASCII decimals, or zero in case no
-  time-out is requested. This file may be checked for by services run during
+  timeout is requested. This file may be checked for by services run during
   system shutdown in order to request the appropriate operation from the boot
   loader in an alternative fashion.