spalling mostly

diff --git a/overlay-boot.8.adoc b/overlay-boot.8.adoc
index b2a103299a5c690acbae5a1a0c5c44a6c570004d..e97a8e4676cad9d8da15cc23f55f5469923e9ce0 100644 (file)
--- a/overlay-boot.8.adoc
+++ b/overlay-boot.8.adoc
@@ -71,7 +71,7 @@ section on Networking below for more details.
 
 INIT::
 
-This variable is a command line to run, with envirnment variable
+This variable is a command line to run, with environment variable
 CONFIG set, for producing the initial commands to the running subhost,
 similar to the initrd phase of a computer bootup. The default value
 for this variable is +overlay-init+.
@@ -100,17 +100,21 @@ as UPPER.
 
 *POSTMOUNT*::
 
-This variable is a command line to run, with envirnment variable
+This variable is a command line to run, with environment variable
 CONFIG set, just after the setup of the subhost root filesystem and
 before the services are started. The default for this variable is
-+overlay-postmount+
++overlay-postmount+. Note that this command is executed within the
+mount namespace of the subhost, and still with the main host as root
+filesystem.
 
 *PREMOUNT*::
 
-This variable is a command line to run, with envirnment variable
+This variable is a command line to run, with environment variable
 CONFIG set, just before the setup of the subhost root filesystem and
 before the services are started. The default for this variable is
-+overlay-premount+
++overlay-premount+  Note that this command is executed within the
+mount namespace of the subhost, and still with the main host as root
+filesystem.
 
 *UPPER*::
 
@@ -123,8 +127,8 @@ as an overlay mount. In that case WORK (below) must be defined as a
 directory outside of but on the same mount as UPPER.
 +
 If UPPER is the same as LOWER, then the subhost root filesystem is not
-setup as an overla. Rather it is set up as a bind mount, if UPPER is
-different from LIVE, or just as a pre-mounted LIVE filesystem.
+setup as an overlay. It Is rather set up either as a bind mount if UPPER is
+different from LIVE, or just taken as a pre-mounted LIVE filesystem.
 
 *WORK*::