Update job-scheduling.md

docs.it4i/cs/job-scheduling.md

@@ -108,6 +108,24 @@ p03-amd01
 p03-amd02
 ```
 
+## Modifying Jobs
+
+```
+$ scontrol update JobId=JOBID ATTR=VALUE
+```
+
+for example
+
+```
+$ scontrol update JobId=JOBID Comment='The best job ever'
+```
+
+## Deleting Jobs
+
+```
+$ scancel JOBID
+```
+
 ## Partitions
 
 | PARTITION | nodes| cores per node | features |