dracut.8: document INITRD_COMPRESS environment variable

https://bugzilla.redhat.com/show_bug.cgi?id=1389775

diff --git a/dracut.8.asc b/dracut.8.asc
index 3b800001ebbd01006604351eba34d1600300cdca..0e017070a6e8909b217180406eb3531b1a26302a 100644 (file)
--- a/dracut.8.asc
+++ b/dracut.8.asc
@@ -434,6 +434,7 @@ will not be able to boot.
     program with known-working arguments. If you pass a quoted string with
     arguments, it will be called with exactly those arguments. Depending on what
     you pass, this may result in an initramfs that the kernel cannot decompress.
+    The default value can also be set via the _INITRD_COMPRESS_ environment variable.
 
 **--no-compress**::
     Do not compress the generated initramfs. This will override any other
@@ -496,6 +497,12 @@ will not be able to boot.
     Specifies the kernel image, which to include in the UEFI executable. The default is
     _/lib/modules/<KERNEL-VERSION>/vmlinuz_ or _/boot/vmlinuz-<KERNEL-VERSION>_
 
+ENVIRONMENT
+-----------
+
+_INITRD_COMPRESS_::
+    sets the default compression program. See **--compress**.
+
 FILES
 -----
 _/var/log/dracut.log_::