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You have to delete all the items in this folder before you can delete the folder” on oneDrive

You may have read the blog posting “Setup of Linux OneDrive on CentOS 7“. If you have multiple subfolders upon subfolders with many items, there may be issues. You have to delete all the items in the sub folders before deleting the final main folder which is tedious.

For more information, do take a look at Microsoft site https://answers.microsoft.com/en-us/msoffice/forum/all/you-have-to-delete-all-the-items-in-this-folder/58299e1f-aea0-4630-9759-05ae474f1157

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Solving environment: failed with initial frozen solve. Retrying with flexible solve

When I was loading my anaconda-2020, I’ve received this error.

conda install -c conda-forge opencv

And I got this error

Solving environment: failed with initial frozen solve. Retrying with flexible solve....

There was this thread from github which was useful and it help a lot! https://github.com/conda/conda/issues/9367

Step 1: To resolve, Create an environment called opencv using

conda create -n opencv

Step 2: Activate it

conda activate opencv

Step 3: Install it again

conda install -c anaconda opencv

(which install opencv 3, but not the most recent 4. In order to create a second environment called opencv4. Use above code to create and activate and do a standard download:

conda install -c conda-forge opencv
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Basic GNU Screen Usage on CentOS

Introduction

Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. In other words, you can start any number of virtual terminals inside the session. The good thing is that processes running inside screen will continue to run even though the SSH session get disconnected.

GNU Screen Site

GNU Screen can be found on http://ftp.gnu.org/gnu/screen/

Source Code

You can get the source code from here

Using Screen

Screen can be easily installed on CentOS with just

# yum install screen

Naming a Named Session

You may be running many sessions and it is a good idea to name the session that you are starting.

screen -S your_preferred_screen_name

Listing running Screen Session

[user1@node1 ~]$ screen -ls
There is a screen on:
2109.myScreenA (Detached)
1 Socket in /var/run/screen/S-user1

Reattach to a Screen Session

To connect back to the screen, just type the numeric id of the screen

screen -r 2109

Detaching from a Screen Session

Inside the Virtual Session, you can detach the screen with the command

Ctrl-a + d

[Press ctrl with “a” and “d” together]
If you are already outside the virtual session, you can detach an active session by

screen -d 2109

Customised Screen

If you a looking at how to split Screen using screen. Here is a good visual guide.

To Terminate the Screen Session,

Enter into the Session screen

screen -r 2109
exit

 

User Guide

https://www.gnu.org/software/screen/manual/screen.html#Startup-Files

Links:

How To Use Linux Screen

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Webinar – Altair 2020 Global Experience

Altair_Conference_2020

Join Altair in our virtual interactive environment to learn about the most significant update release of Altair software in the history of Altair. See how virtual validation will proceed with greater certainty across multiple physics domains.

  • Learn how simulation-driven design can improve your development efficiency, optimize product performance, and accelerate growth
  • See the latest Altair product developments for both customers new to simulation and experts in computer-aided engineering (CAE)
  • Discover how smart data insights, high-performance computing and cloud solutions can help you solve your toughest challenges

Watch keynote speakers, view technical sessions, and communicate live with product experts

For more information, see https://altair2020.virtual.altair.com/

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Webinar – Powering Your optical Design and Simulation with ANSYS SPEOS

CADIT_ANSYS_22May2020

ANSYS SPEOS
ANSYS SPEOS enable you to design and optimize your optical system quickly and easily, speed your time to market, reduce your physical prototyping and your development time. SPEOS combines lighting performance modeling with extensive, dedicated libraries and optimization capabilities. With SPEOS, you can study the interactions of photons with mechanical geometries to quickly create a functional illumination system for your product. It is a perfect tools for designing, validate and optimize performance of automotive lighting systems, aerospace and deference optic systems, optical sensor test for AV/ADAS and general lightings.

To Register