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Eclipse 2019-12 was released last December 18, 2019. Roku plugin for Eclipse is not working yet with the latest version. I will keep this post updated as I learn more. Note that Roku plugin for Eclipse works with Eclipse 2019-09(4.13), this was tested on Ubuntu 19.10. Reference: https://blog.roku.com/developer/roku-eclipse-plugin https://community.roku.com/t5/Roku-Developer-Program/Roku-plugin-for-Eclipse-not-working-using-version-2019-12/m-p/531443#M44770

I am getting the following error message as a regular user in FreeBSD (12.1) common.c: unimplemented subshell type 1 read (subshell_pty...): No error: 0 (0) As a workaround, do: $: SHELL=/bin/csh mc Reference: https://forums.freebsd.org/threads/misc-mc-problem.55627/

When running su on FreeBSD and you are getting su: Sorry that could mean that the user is not part of the wheel group. To fix this, do: Login as root, this can be rebooting the machine or open another TTY terminal (Alt+F2 might help). Re-mount root filesystem for read/write operation #: mount -u -w / Add user to the wheel group. Assume below that u1 is the user that will be added to the group #: pw usermod u1 -G wheel Remount root filesystem back to read-only #: mount -u -r / If you go back to the psuedo terminal of the u1 user, you should be able to run su this time. Reference: https://graspingtech.com/freebsd-fix-su-sorry-message/

Installing FreeBSD 12.1 on VirtualBox 6.1.0 (Windows 10 host) failed with Guru Mediation. As a workaround, from the command line, do: c:\> "C:\Program Files\Oracle\VirtualBox\VBoxManage" modifyvm "FreeBSD" --spec-ctrl on Reference: https://forums.virtualbox.org/viewtopic.php?f=6&t=94390#p455778

$: ps -aef --forest To show full command line argument, use: $: ps auxfww

I like my font to be monospace like below for my Freeplane document. To change Freeplane's defualt font, do Format | Manage Styles | Edit styles Then change Font of whole core | Font Family to say Consolas

To change to VIM, do: c:\> git config core.editor "vim"

Installed Appium and Appium Windows Driver lately (12/18/2019) and observed that I can't get Windows application to be automated. It turns out that Appium v1.15.1 is hardcoded to check for Windows Application Driver version 1.1. To workaround, I made changes to %appdata%\npm\node_modules\appium\node_modules\appium-windows-driver\build\lib\installer.js, in two areas: Changed to  WAD_VER = '1.2' Changed to  WAD_EXE_MD5 = '50d694ebfaa622ef7e4061c1bf52efe6' See below for complete copy.

c:\> reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock" /t REG_DWORD /f /v "AllowDevelopmentWithoutDevLicense" /d "1" Reference: https://docs.microsoft.com/en-us/windows/uwp/get-started/enable-your-device-for-development

Running VS Code with  C# for Visual Studio Code (powered by OmniSharp) plugin is complaining about the following: The .NET Core SDK cannot be located. .NET Core debugging will not be enabled. Make sure the .NET Core SDK is installed and is on the path. This happened on my environment when I have installed dotnet-sdk using snap. To workaround, do: $: sudo ln -sv /snap/dotnet-sdk/current/dotnet /usr/local/bin/dotnet Reference: https://github.com/OmniSharp/omnisharp-vscode/issues/3077

To view currently supported version of dotnet-dsk, do: $: sudo snap install dotnet-sdk Installing latest stable: $: sudo snap install dotnet-sdk dotnet will not be available in the command line as snap creates dotnet-sdk.dotnet . Let us create an alias to make it convenient: $: sudo snap alias dotnet-sdk.dotnet dotnet

TightVNC is a graphical-sharing software that works in many platforms like Windows, Linux or OSX. To install TightVNC on Windows using Chocolatey, do: c:\> choco install tightvnc -y --installArguments "VIEWER_ASSOCIATE_VNC_EXTENSION=1 SERVER_REGISTER_AS_SERVICE=1 SERVER_ADD_FIREWALL_EXCEPTION=1 VIEWER_ADD_FIREWALL_EXCEPTION=1 SERVER_ALLOW_SAS=1 SET_USEVNCAUTHENTICATION=1 VALUE_OF_USEVNCAUTHENTICATION=1 SET_PASSWORD=1 VALUE_OF_PASSWORD=p@$$w0rd SET_USECONTROLAUTHENTICATION=1 VALUE_OF_USECONTROLAUTHENTICATION=1 SET_CONTROLPASSWORD=1 VALUE_OF_CONTROLPASSWORD=p@$$w0rd" Where: p@$$w0rd - the administrator password that will be used for the TightVNC application References: https://www.tightvnc.com/ https://chocolatey.org/  

When you download a zip file or an executable file from the internet using IE, Edge or Chrome on Windows, more likely than not the file will have it zone identifier in the alternate stream of the file. This information is used by Windows to determine if the file was downloaded from the internet and it can apply certain level of security precautions for the user. In some instances, files/installers with zone identifiers will not install properly. There are multiple ways to check if the file have zone id. You can use streams , like so: c:\> streams64.exe tightvnc-2.8.27-gpl-setup-64bit.msi And this would spit out something like: streams v1.60 - Reveal NTFS alternate streams. Copyright (C) 2005-2016 Mark Russinovich Sysinternals - www.sysinternals.com C:\temp\tightvnc-2.8.27-gpl-setup-64bit.msi: :Zone.Identifier:$DATA 163 Or just plain PowerShell, like: PS c:\> Get-Content -Path .\tightvnc-2.8.27-gpl-setup-64bit.msi -Stream Zone.Identifier Which will actu

Download TightVNC and then run the command below where the file is located. In the example below, it is assumed that the file is located in C:\ and that the file was unblocked after downloading. c:\> "tightvnc-2.8.27-gpl-setup-64bit.msi" /quiet /norestart ADDLOCAL="Server,Viewer" VIEWER_ASSOCIATE_VNC_EXTENSION=1 SERVER_REGISTER_AS_SERVICE=1 SERVER_ADD_FIREWALL_EXCEPTION=1 VIEWER_ADD_FIREWALL_EXCEPTION=1 SERVER_ALLOW_SAS=1 SET_USEVNCAUTHENTICATION=1 VALUE_OF_USEVNCAUTHENTICATION=1 SET_PASSWORD=1 VALUE_OF_PASSWORD=p@$$w0rd SET_USECONTROLAUTHENTICATION=1 VALUE_OF_USECONTROLAUTHENTICATION=1 SET_CONTROLPASSWORD=1 VALUE_OF_CONTROLPASSWORD=p@$$w0rd Change p@$$w0rd to the desired password Reference: https://www.tightvnc.com/

Sample code to open and close Notepad using WhiteX or TestStack.White.

PS c:\> Set-DnsClientServerAddress -InterfaceIndex 10 -serveraddresses ("192.168.137.1") Where: 10 - is the interface index. This can be found by running Get-NetAdpater , this will be the column named ifIndex . ("192.168.137.1") - is the DNS server address(es) you want to assign to that interface, this is a comma separated list. Note: This only works on Powershell 3 (or maybe later). Reference(s): http://4sysops.com/archives/how-to-configure-a-network-interface-card-nic-with-powershell-3/

PS c:\> Get-NetAdapter | where {$_.Name -eq "Ethernet 3"} | Format-List * Where: Ethernet 3 - is the name of the interface Note: This will need Powershell 3.0 or later

PS c:\> [guid]::NewGuid()

Open Virtual Machine Manage Command Shell. From the shell type: PS c:\> Invoke-Expression C:\Users\User01\Documents\script1.ps1 Where: C:\Users\User01\Documents\script1.ps1 - the script to be run

Where: timus - is the user you want to get membership of mydomain - domain name or PC name if workgroup

When I remote desktop to Windows machines most of the time the fonts just looks ugly. This can be improved by enabling ClearType and I do this every time I connect to a box which I do several times a day. Below is a Powershell code that enables ClearType which I shamelessly copied from StackOverflow. Reference(s): http://stackoverflow.com/questions/5676768/enable-disable-cleartype-in-windows7

Windows 10 update 1511 sometimes losses connection inside a VirtualBox(5.0.16) VM. Mostly it happens after the host machine recovers from sleep or hibernate. Workaround I have observed so far is to disable/enable the interface. This can get boring overtime, so below is the PowerShell script that I use to automate it. Note that O is the name of my network adapter.

Hide an application (notepad in this case) from task bar using PowerShell Reference(s): http://stackoverflow.com/questions/7219063/win32-how-to-hide-3rd-party-windows-in-taskbar-by-hwnd

Hyper-V that is shipped with Windows 10 1903 is supposed to have Enhanced Session Mode support for Ubuntu 19.04 when the VM was created using Quick Create option. As of December 1, 2019 Enhanced Session Mode is not working, as a workaround, do the following steps. Assuming a Ubuntu 19.04 VM was created using "Quick Create" option, do: 1. From the host machine, run PowerShell as administrator PS c:\> Set-VM -VMName __Ubuntu_VM_Name_here__ -EnhancedSessionTransportType HvSocket Replace  __Ubuntu_VM_Name_here__ with the Hyper-V VM name. You have to ensure that the VM is not running at this point. 2. Power-up the VM, and then install linux-azure kernel, like: $: sudo apt install linux-azure 3. Shutdown the VM. This is very important, restarting the VM does not work. You can do, like: $: sudo shutdown -h now Once the VM is turned off, turn it back on. It should now have Enhanced Session Mode. For example, the screen dimension can be changed on connection, co

Quick one liner to get Windows BIOS serial number. wmic bios get serialnumber | clip This only works for Windows operating system. Clip only works with Vista or later versions. Note that the output contains the string "SerialNumber" and the tag.

To take a screen capture in Samsung Galaxy S10+, press both power and volume down buttons at the same time.

$: mc -S yadt256 This will run Midnight Commander using "Yet Another Dark Theme with 256 color with dark background" style.

termux is a terminal emulator and Linux environment on Android. To make it even better (looks), enable powerline-status. Start by installing git on termux, like: x1@x1-pc:~$ pkg install git Then clone termux-style, like: x1@x1-pc:~$ git clone https://github.com/adi1090x/termux-style.git x1@x1-pc:~$ cd termux-style x1@x1-pc:~$ chmod +x setup x1@x1-pc:~$ ./setup x1@x1-pc:~$ termux-style Then install Python, like: x1@x1-pc:~$ pkg install python Next up, install powerline-status, like: x1@x1-pc:~$ pip install powerline-status Update ~/.bash_profile to load powerline-status, like: //xyz

I have iPad 6th gen paired with Logitech Type+ bluetooth keyboard. It is not a bad combination for doing quick remote work. Anyway, Termius+ssh+vim is pretty neat. Termius shows convenient keys including ESC key but if you wanted to use your keyboard to simulate ESC key do press fn+Home( ) keys.

Running Midnight Commander on a Linux machine remotely that does not have function key support or not easy to access like mobile phones can be challenging. Generally, Linux console supports escape sequences, for example to simulate F1, press ESC+1 (press escape key, then press 1). Below shows convenient list of escape sequences for Midnight Commander Action Shortcut Escape Sequence (⎋ symbol) Close application F10 ⎋+0 User Menu F2 ⎋+2 Application Menu F9 ⎋+9

Shutdown Ubuntu from the command line $: sudo shutdown -h now

$: apt show ssh This will show package description for ssh .

$: sudo netstat -tulpn

To install Entity Framework Core 3.1.x Preview 3, do: $: dotnet tool install --global dotnet-ef --version 3.1.0-preview3.19554.8 $: export DOTNET_ROOT=$HOME/.dotnet Note that I am using local install of .Net Core 3.1 Preview 3 hence the need to export DOTNET_ROOT.

$: cd ~/ $: mkdir tmp $: cd tmp $: wget https://dotnetwebsite.azurewebsites.net/download/dotnet-core/scripts/v1/dotnet-install.sh $: chmod +x dotnet-install.sh $: ./dotnet-install.sh -Version 3.1.100-preview3-014645 $: export PATH="$HOME/.dotnet:$PATH"

Chromium is the free and open source web browser developed by Google. To install it in Ubuntu do: $: sudo apt install chromium-browser

List of free math applications: Maxima - computer algebra system ( link ) GNU Octave is a high-level language, primarily intended for numerical computations ( link ) Python + scipy + matplotlib + ipython + pylab - python based numerical package (link - various ) R - a language and environment for statistical computing and graphics ( link ) Sage ( link ) Scilab -  is an open source, cross-platform numerical computational package and a high-level, numerically oriented programming language( link )

Method 1 $: cat /etc/os-release | grep PRETTY_NAME Method 2 $: cat /etc/issue Method 3 $: lsb_release -d -s