Windows on Blog - uTIcARdI

os.path.join() or os.sep.join()?

Tue, 23 Jul 2019 00:00:00 +0000

There are two functions join a full path. E.g.: In drive: C:

|- test
| |- test.xt

os.path.join

import os
fullpath = os.path.join('c:', 'test', 'test.txt')

Output on windows:

c:test\test.txt

Output on Mac OS

c:/test/test.txt

os.sep.join

import os
fullpath = os.sep.join(['c:', 'test', 'test.txt'])

Output on windows:

c:\test\test.txt

Output on Mac OS

c:/test/test.txt

From the outputs, you can see the difference: os.path.join() doesn’t work as expected on windows.

Further verification:

with open(fullpath) as test:
 test.read()

Run with error:

 with open(fullpath) as test:
FileNotFoundError: [Errno 2] No such file or directory: 'c:test\\test.txt'

File name on windows

Fri, 01 Mar 2019 00:00:00 +0000

Error 1

Run a bat (ping.bat) to ping multiple IPs like this:

set testipa=x.x.x.x
echo Checking ping %testipa% (15 times), please don't close current window
echo ping %testipa% (15 times) >> test.log
ping %testipa% -w 500 -n 15 >> test.log

But got the following error:

Checking ping x.x.x.x (15 times), please don't close current window
The process cannot access the file because it is being used by another process.
The process cannot access the file because it is being used by another process.

Monitor network connections based on Process

Fri, 21 Sep 2018 00:00:00 +0000

Wireshark is widely used in packets capturing with flexible filters, but for some particular cases, end users care about the network sessions which established by a specific application.

I will show how to check the sessions of ‘Microsoft OneNote’.

Windows

Microsoft provides its own product for packets capturing: Microsoft Network Monitor.

Lunch ‘Microsoft Network Monitor’ before you run OneNote:

nm-1

You will see the processes from the left panel, All related network sessions will shown in the ‘frame summary’ window once OneNote lunched:

Run Ansible on Windows

Tue, 29 Nov 2016 00:00:00 +0000

Background:

Here is a topology about the environment for performance testing, let’s name the servers 1st:

1 windows server as the License/Workspace server
5 windows servers as the Network Server
5 windows servers as the Automation server

Topo

It took us a lot of time to deploy the product and collect logs on all of these servers.

VSphere6, VCenter6 Installation

Fri, 08 Jan 2016 00:00:00 +0000

Crash happened when I install Vsphere on my PC

Solution: Disable option “Limit Maximum CPUID” in Bios
VCenter appliance deployment

Vmware doesn’t provide vcenter appliance in ova/ovf format anymore, follow the instruction to deploy it.
Inventory is empty in the VCenter webpage

The most important thing: Don’t login vcenter by the account ‘root’, instead of it using SSO account. the account in the format: ‘administrator@domain-name’

Also, Vmware has a KB about this issue:

SNMP simulator installation guide

Wed, 13 Nov 2013 00:00:00 +0000

About SNMP Simulator

The the SNMP Simulator software is intended for testing SNMP Managers against a large number of SNMP Agents that represent a potentially very large network populated with different kinds of SNMP-capable devices.

Refers to its project page for more info.

Why?

With SNMP simulator you can simulate a device by the output of SNMPwalk without considering MIB files.

This article is about how to install SNMP Simulator.

Install Python