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diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index 777e0a3a7..8396def00 100644
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -49,7 +49,10 @@
- systemd-nspawn OPTIONSCOMMANDARGS
+ systemd-nspawn
+ OPTIONS
+ COMMAND
+ ARGS
@@ -93,9 +96,10 @@
container.
Use a tool like
- yum8
- or
+ yum8,
debootstrap8
+ or
+ pacman8
to set up an OS directory tree suitable as file system
hierarchy for systemd-nspawn
containers.
@@ -113,7 +117,10 @@
see each other. The PID namespace separation of the
two containers is complete and the containers will
share very few runtime objects except for the
- underlying file system.
+ underlying file system. It is however possible to
+ enter an existing container, see
+ Example 4 below.
+
systemd-nspawn implements the
-
+ Prints a short help
text and exits.
@@ -146,8 +153,8 @@
-
+ Directory to use as
file system root for the namespace
@@ -157,18 +164,20 @@
-
+ Automatically search
for an init binary and invoke it
instead of a shell or a user supplied
- program.
+ program. A command to execute cannot
+ be specified in this case.
+
-
+ Run the command
under specified user, create home
@@ -191,8 +200,8 @@
-
+ Makes the container appear in
other hierarchies than the name=systemd:/ one.
@@ -261,13 +270,13 @@
not linked. If host,
the journal files are stored on the
host file system (beneath
- /var/log/journal/<machine-id>)
+ /var/log/journal/machine-id)
and the subdirectory is bind-mounted
into the container at the same
location. If guest,
the journal files are stored on the
guest file system (beneath
- /var/log/journal/<machine-id>)
+ /var/log/journal/machine-id)
and the subdirectory is symlinked into the host
at the same location. If
auto (the default),
@@ -317,7 +326,35 @@
distribution into the directory
~/debian-tree/ and then spawns a
shell in a namespace container in it.
+
+
+
+ Example 3
+
+ # pacstrap -c -d ~/arch-tree/ base
+# systemd-nspawn -bD ~/arch-tree/
+
+ This installs a mimimal Arch Linux distribution into
+ the directory ~/arch-tree/ and then
+ boots an OS in a namespace container in it.
+
+
+
+ Example 4
+
+ To enter the container, PID of one of the
+ processes sharing the new namespaces must be used.
+ systemd-nspawn prints the PID
+ (as viewed from the outside) of the launched process,
+ and it can be used to enter the container.
+
+ # nsenter -muinpt $PID
+ nsenter1
+ is part of
+ util-linux.
+ Kernel support for entering namespaces was added in
+ Linux 3.8.
@@ -332,8 +369,10 @@
systemd1,
chroot1,
+ unshare1,
yum8,
- debootstrap8
+ debootstrap8,
+ pacman8