Data Networking Blog
Blog for Admins
Blog

Recently did a job for a client where the AD Accounts from his directory server were no longer synchronizing back to Office 365 with errors about duplicate proxyAddresses. AD Connect synchronization service manager UI displayed the following errors: The Problem What happened was that he had the users sync’d with Office 365 and everything working […]

Standard
June 12, 2018 Cloud
Jd

Linux Kernel has a modular design where modules can be plugged in and out if and when required. So, if we plug in a new hardware that requires a driver, a relevant module is automatically loaded to the Kernel. If a module is not being used anymore then it may be unloaded automatically. udev is […]

Standard
July 27, 2017 Uncategorised
Jd

According to the rpm man page description: “rpm  is  a  powerful Package Manager, which can be used to build, install, query, verify, update, and erase individual software packages.  A package consists of an archive of files and meta-data used to install and erase the archive files. The meta-data includes helper scripts,  file  attributes, and  descriptive  information about […]

Standard
July 5, 2017 Linux, RHCSA
Jd

In the previous two posts we looked at the basic permissions for Linux File System and the umask concept and how that works. In this post, we will look at special permissions for Linux File System. The basic permissions are great and we can do a lot with them but then there are times when […]

Standard
June 29, 2017 Linux, RHCSA
Jd

In the previous post Linux File System Permissions – Basics we learned about the basic permissions on files and folders. How does the system know what are the default permissions when you create a file/folder? Let’s create a new file as an ordinary user.

So, I added a file called examplefile as user anna. The […]

Standard
June 29, 2017 Linux, RHCSA, Uncategorised
Jd

I have always admired the way Linux handles permissions and I feel it’s a fool proof system. I was well aware of the User, Group and Other permissions set on files and folders and I had also read about umask, special permissions and ACLs but I never bothered looking too much into details for these […]

Standard
June 23, 2017 Linux, RHCSA
Jd

A while back I had to write a script to download a bunch of files periodically on a Windows machine. I tried using some native built-in method of doing it but could’t find much useful information. Finally used WinSCP and PowerShell to download files. This uses SFTP and SCP which is basically over SSH. I […]

Standard
October 13, 2016 PowerShell, Script, Windows
Jd

So my company was hit with crypto virus twice in the last two and a half weeks. Luckily we got everything under control in time and thankfully did not have to pay a single cent. But as a pro-active measure I wrote a small crypto virus scanner script that scans our file server for files […]

Standard
October 7, 2016 PowerShell, Script, Windows
Jd

The following script scans IPV4 networks for hosts that respond to ICMP requests. The idea is that the script automatically finds the IP and MASK of the configured interfaces on the machine, calculates the range from IP/Mask and starts scanning. Also displays a visual progress bar. This PowerShell Lan Scanner script will also try and […]

Standard
September 27, 2016 PowerShell, Script, Systems, Windows
Jd

.Net and Powershell are now available for Linux as open source packages. This is a good move as i think this will make a lot of people really comfortable with using Linux. Before we can install Powershell core we need the .Net core installed as Powershell is built on top of .Net sudo yum install […]

Standard
August 19, 2016 Linux, PowerShell, Script, Windows
Jd
Font Size
Decrease Size Default Size Increase Size
Select Skin
Select Underlay Background
Select Overlay Background
Scheme Switcher Toggle