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doc: add journalctl example for grepping the logs

I had to dig around for awhile to figure this out, so
this adds an example on how to grep journalctl nova logs
for a server instance UUID.

Change-Id: I6a5c47fbcba3af1822e2f9efc2ac20ebe0387f3f

Matt Riedemann authored on 2017/09/23 09:54:39
Showing 1 changed files

doc/source/systemd.rst

History View file @ 5085dc0

@@ -118,6 +118,11 @@ When outputting to the terminal using the default pager, long lines
                      appear to be truncated, but horizontal scrolling is supported via the
                      left/right arrow keys.
                     +You can pipe the output to another tool, such as ``grep``. For
                     +example, to find a server instance UUID in the nova logs::
+                    +
                     +  sudo journalctl -a --unit devstack@n-* | grep 58391b5c-036f-44d5-bd68-21d3c26349e6
+                    +
                      See ``man 1 journalctl`` for more.
                      Debugging