tighten markup

1 files changed, 20 insertions, 13 deletions

diff --git a/ADMIN.md b/ADMIN.md
index cd2bb3e..c20205b 100644
--- a/ADMIN.md
+++ b/ADMIN.md
@@ -10,26 +10,33 @@
 
 ## System upgrade
 
-Make sure your current system is up-to-date:
+Make sure your current system is up-to-date.  
+Check </etc/apt/sources.list*> files that only current release is used.
+Then update and upgrade:
 
-  * Check /etc/apt/sources.list* files that only current release is used.
-  * Update and upgrade:
+```shell
+apt update
+apt upgrade
+```
 
-	apt update; apt upgrade
+Make sure that all auto-installed packages are marked as such.  
+Start aptitude in fullscreen mode:
 
-Make sure that all auto-installed packages are marked as such:
+```shell
+aptitude -u
+```
 
-  * Start aptitude in fullscreen mode:
-
-	aptitude -u
+In aptitude...:
 
   * Check each installed package: Flag as auto-installed as appropriate
   * Remove no longer used packages as needed (press "g" twice).
 
-Double-check packages unneeded for or alien to current release:
-
-  * Compute package lists:
+Double-check packages unneeded for or alien to current release.  
+Compute package lists:
 
-	localbackuppkglists
+```shell
+localbackuppkglists
+```
 
-  * locate and inspect aliens and explicits below /etc/*/localpkglists.*
+After running the above,
+locate and inspect aliens and explicits below </etc/*/localpkglists.*>.