If you are into Production Support/Middleware Administrator then most probably you will have to work on Linux and Windows OS.
Supporting production applications will be challenging if not familiar with administration commands.
So here are things you should be familiar with windows, which will help you as an administrator to troubleshoot, support applications in daily life.
Following are tested on Windows 8.
Finding CPU Information
CPU information is often needed for troubleshooting performance issue or working on capacity planning.
1. Check how many CPU exist
- Go to Task Manager
- Click on “Performance” tab to see number of CPU available
You may also use a wmic command to get CPU information.
- Open Command Prompt
- Type below command and press enter
2. Check CPU Processor type
- Right click on Computer and click on Properties
- Look for processor details under System section
You may also use “wmic cpu” command to get this information.
Finding Memory Information
Often needed in a combination of CPU to troubleshoot the application performance issue.
3. Check Installed Memory and Utilization
- Go to Task Manager
- Click on “Performance” tab >> Memory
As you can see total/available/utilized memory
You may also use “systeminfo” command to check available physical memory.
C:\Users\Chandan Kumar>systeminfo | findstr Memory Total Physical Memory: 4,239 MB Available Physical Memory: 3,422 MB Virtual Memory: Max Size: 7,951 MB Virtual Memory: Available: 7,099 MB Virtual Memory: In Use: 852 MB C:\Users\Chandan Kumar>
4. Check Uptime/Boot time
If your Windows server is rebooted unexpectedly and needs to find out when exactly it happened then this would be very handy. Use below command on command prompt.
C:\Users\Chandan Kumar>systeminfo | findstr Boot System Boot Time: 2/21/2016, 11:02:26 AM Boot Device: \Device\HarddiskVolume1 C:\Users\Chandan Kumar>
If you need to find out process start time in Windows, then you can refer here.
5. Check TCP Packet Errors
If you are troubleshooting network related problem, then this would be probably one of the first things to check. Use netstat command to check for any errors.
C:\Users\Chandan Kumar>netstat -s | findstr Errors Received Header Errors = 0 Received Address Errors = 0 Received Header Errors = 0 Received Address Errors = 0 Errors 0 0 Errors 0 0 Receive Errors = 0 Receive Errors = 0 C:\Users\Chandan Kumar>
6. Check all running processes
To list all the tasks running with their PID and Memory usage, you can use tasklist command.
C:\Users\Chandan Kumar>tasklist Image Name PID Session Name Session# Mem Usage ========================= ======== ================ =========== ============ System Idle Process 0 Services 0 20 K System 4 Services 0 1,264 K smss.exe 304 Services 0 928 K csrss.exe 408 Services 0 3,548 K wininit.exe 480 Services 0 3,368 K services.exe 568 Services 0 6,876 K
If you need to check particular process running or not, you may use tasklist with findstr.
C:\Users\Chandan Kumar>tasklist | findstr cmd cmd.exe 240 Console 2 2,160 K C:\Users\Chandan Kumar>
Alternatively, you can also use Task Manager to see all the running process with its CPU/Memory/Disk/Network utilization.
7. Kill running process
Often used if a process is not responding and you need to kill it. You may either kill the process with “taskkill” command or Task Manager.
To kill using taskkill
- Open command prompt
- Execute taskkill command with process PID
C:\Users\Chandan Kumar>taskkill -pid 312 SUCCESS: Sent termination signal to the process with PID 312. C:\Users\Chandan Kumar>
To kill using Task Manager
- Open Task Manager
- Right click on process you want to kill and click on “End task.”
8. Find out IP, Subnet Mask; MAC address
ipconfig is a handy command to find out the IP address of Windows server. This will display the entire Ethernet adaptor and their IP address.
If you need to find out the details in depth, then you can use /all syntax.
To flush the DNS cache, you can use /flushdns syntax. This will be often helpful if you have done some DNS changes and it’s not reflected due to data stored in the cache.
9. Display user and group information
“whoami” command will help you to check the user details of logged in user and the group it belongs to.
C:\Users\Chandan Kumar>whoami win-nffe5b9pda0\chandan kumar C:\Users\Chandan Kumar>
To check the group it belongs to
10. Perform DNS lookup
“nslookup” command will help to find out DNS resolving IP address.
C:\Users\Chandan Kumar>nslookup geekflare.com Server: UnKnown Address: 172.16.179.2 Name: geekflare.com.localdomain Addresses: 18.104.22.168 22.214.171.124 C:\Users\Chandan Kumar>
If your network administrator blocks nslookup to external DNS, then you may use online tools to perform DNS lookup.
11. Capture network trace
You can use netsh command to capture the trace if you don’t have Wireshark or other capture software installed.
C:\Windows\system32>netsh trace start capture=yes Trace configuration: ------------------------------------------------------------------- Status: Running Trace File: C:\Users\Chandan Kumar\AppData\Local\Temp\NetTraces\NetTrace.etl Append: Off Circular: On Max Size: 250 MB Report: Off C:\Windows\system32>
To stop the capture
netsh trace stop
I hope above helps you to get familiar with some of the Windows administration related tasks. If you are a newbie, I would strongly recommend this online course.