Update README.md

README.md

@@ -15,12 +15,12 @@ LLDP inventory-columns: `"system_name,local_port_num,port_id"`
 
 Usage with CDP (this is the default):
 ```
-~/local/lib/topology_data/create_topology_data.py -s CORE01 -m
+~/local/lib/topology_data/create_topology_data.py -s Core01 -m
 ```
 
 Usage with LLDP:
 ```
-~/local/lib/topology_data/create_topology_data.py -s CORE01 -m --lldp
+~/local/lib/topology_data/create_topology_data.py -s Core01 -m --lldp
 
 ```
 
@@ -133,7 +133,7 @@ OMD[build]:~$
 To make the topology created by this tool the default use the option `-m` / `--make-default`
 
 ```
-$ ~/local/bin/topology_data/create_topology_data.py -s CORE01 -m
+$ ~/local/bin/topology_data/create_topology_data.py -s Core01 -m
 ```
 
 </details>
@@ -141,11 +141,36 @@ $ ~/local/bin/topology_data/create_topology_data.py -s CORE01 -m
 <details><summary>Can i automate the creation of the topology data</summary>
 
 \
-Yes. Add a cron job for the site user in `~etc/check_mk/conf.d/`. The tool can than run in regular intervals. By default it will only create a new topology if the new topology differs from the default topology. So by running
+Yes. Add a cron job for the site user in `~/etc/cron.d`. I.e. to create a topology every hour create the file `create_topoloky_data` in `~/etc/cron.d`
+
+```
+0 * * * * $OMD_ROOT/local/bin/topology_data/create_topology_data.py -s C9540-7-1 -m --keep-max 10 --keep-max 10 --min-age 14
+```
+
+This will run the tool every hour and create a new topology if there was a changee. It keeps 10 topologies and deletes old topologies only if they are older than 14 days.
+
+Don't forget to restart the crontab service after creating the cron job.
+
+```
+OMD[build]:~/etc/cron.d$ omd restart crontab 
+Temporary filesystem already mounted
+Removing Crontab...OK
+Initializing Crontab...OK
+OMD[build]:~/etc/cron.d$ 
 ```
-$ ~/local/bin/topology_data/create_topology_data.py -s CORE01 -m
+
+With crontab -l you get the list of active cron jobs
+
+```
+OMD[build]:~/etc/cron.d$ crontab -l | grep -A 3 -B 1  create_topoloky_data 
+# ------------------------------------------------------------
+# /omd/sites/build/etc/cron.d/create_topoloky_data
+0 * * * * $OMD_ROOT/local/bin/topology_data/create_topology_data.py -s Core01 -m --keep-max 10
+
+# ------------------------------------------------------------
 ```
-you get each time a new default topology if ther was a change. The name for the new topology is by default the creation date and time.
+
+**Note**: By default it will only create a new topology if the new topology differs from the default topology. The name for the new topology is by default the creation date and time.
 
 </details>
 
@@ -155,7 +180,7 @@ you get each time a new default topology if ther was a change. The name for the
 Yes. If you use the option --keep-max <number of topologies to keep> the tool will delete all topologies over this number. I.e.
 
 ```
-$ ~/local/bin/topology_data/create_topology_data.py -s CORE01 --keep-max 10
+$ ~/local/bin/topology_data/create_topology_data.py -s Core01 --keep-max 10
 ```
 will delete the oldest topologies until there only 10 topologies left.
 
@@ -166,11 +191,9 @@ will delete the oldest topologies until there only 10 topologies left.
 <details><summary>I will not delete topologies from the last X days</summary>
 
 No problem. Just use the option `--min-age` togeher with `--keep-max`. I.e. 
-
 ```
-$ ~/local/bin/topology_data/create_topology_data.py -s CORE01 --keep-max 10 --min-age 30
+$ ~/local/bin/topology_data/create_topology_data.py -s Core01 --keep-max 10 --min-age 30
 ``` 
-
 will only delete a topology if it older than 30 days.
 
 **Note**: the minimum value for `--min-age` is _1_ day.
@@ -252,7 +275,7 @@ Wehre `-p` is the path to your inventory data and `-c` are the columns used in t
 Sample output
 
 ```
-OMD[build]:~$ ~/local/bin/topology_data/create_topology_data.py -s CORE01
+OMD[build]:~$ ~/local/bin/topology_data/create_topology_data.py -s Core01
 Start time: 2023-10-16T21:44:53.10
 Devices added: 66, source inv_CDP
 time taken: 1.035935568/s