updated notes

src/rhcsa.md

@@ -105,9 +105,31 @@ top # Display running processes
 top -o %MEM # Sort by memory usage
 
 top -o %CPU # Sort by CPU usage
+
+top -p 1234 # Display information for process 1234
+```
+### pidof
+```bash
+pidof sleep # Display the PID of the sleep command
+```
+
+### kill
+```bash
+kill -l # List all signals
+
+kill -9 1234 # Kill the process with PID 1234
+```
+
+### nice
+```bash
+nice -n 10 sleep 100 # Run the sleep command with a priority of 10
 ```
 
 
 
 
 
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