How to add SSH Public key to an existing Droplet or VM?

First copy your Public key using the following command: 

cat ~/.ssh/id_rsa.pub

or 

pbcopy ~/.ssh/id_rsa.pub

Now login into your Droplet or VM and open the following file then paste your public key into authorized_keys file.

nano ~/.ssh/authorized_keys

Save the file and try to login from your local terminal.

Fix Adding new SSL virtual website .. .. certificate authority file is not valid : Data does not start with line -----BEGIN CERTIFICATE-- in virtualmin

Open the file at /etc/webmin/virtual-server/domains/13694005276497

Delete including 4 lines pointing to the 4 certificate files: ssl.cert, ssl.combined, ssl.everything & ssl.key

Then re-add the ssl.

How to generate SSH keys in Windows PowerShell

 Open your PowerShell and follow the steps:

ssh

ssh-keygen -b 4096

C:\Users\WINUSER/.ssh/id_rsa.pub

notepad C:\Users\WINUSER/.ssh/id_rsa.pub

How to check TCP, UDP Domain Socket using NetCat

 Install the netcat Using the fllowing command:

$ yum install nc      [On CentOS/RHEL]

$ dnf install nc      [On Fedora 22+ and RHEL 8]

$ sudo apt-get install Netcat      [On Debian/Ubuntu]

NetCat commands:

$ nc -v -w 2 z 192.168.56.1 22     #scan a single port

OR

$ nc -v -w 2 z 192.168.56.1 22 80  #scan multiple ports

OR

$ nc -v -w 2 z 192.168.56.1 20-25  #scan range of ports

How to hide IP in header from Postal MTA

Remove  text where need using the following file in postalMTA.

For SMTP Server:

lib/postal/smtp_server/client.rb

@receiving_headers = true
received_header_content = "from #{@helo_name} (#{@hostname} [#{@ip_address}]) by #{Postal.config.dns.smtp_server_hostname} with SMTP;

For HTTP:

app/models/outgoing_message_prototype.rb

mail.header['Received'] = "from #{@source_type} (#{self.resolved_hostname} [#{@ip}]) by Postal with HTTP; #{Time.now.utc.rfc2822.to_s}"
mail.message_id = "<#{@message_id}>"

How to view saved password in Outlook 2003, 2007, 2010, 2013, 2016, 2019

Use Unmask Password Tool to reveal hidden behind the asterisk icon.

Windows:

Download from Google Drive

Download from CNET

Mac:

To see if the password is available, first open the “Keychain Access” program on your Mac (click the Go menu in the Finder and choose Applications, then open Utilities and Keychain Access).

Office 2019 Activation without Product Key using CMD

Put the following code in a TXT file and save as "file.cmd" then run the cmd file as administrator. 

@echo off

title Activate Microsoft Office 2019 ALL versions for FREE!&cls&echo ============================================================================&echo #Project: Activating Microsoft software products for FREE without software&echo ============================================================================&echo.&echo #Supported products:&echo - Microsoft Office Standard 2019&echo - Microsoft Office Professional Plus 2019&echo.&echo.&(if exist "%ProgramFiles%\Microsoft Office\Office16\ospp.vbs" cd /d "%ProgramFiles%\Microsoft Office\Office16")&(if exist "%ProgramFiles(x86)%\Microsoft Office\Office16\ospp.vbs" cd /d "%ProgramFiles(x86)%\Microsoft Office\Office16")&(for /f %%x in ('dir /b ..\root\Licenses16\ProPlus2019VL*.xrm-ms') do cscript ospp.vbs /inslic:"..\root\Licenses16\%%x" >nul)&(for /f %%x in ('dir /b ..\root\Licenses16\ProPlus2019VL*.xrm-ms') do cscript ospp.vbs /inslic:"..\root\Licenses16\%%x" >nul)&echo.&echo ============================================================================&echo Activating your Office...&cscript //nologo ospp.vbs /unpkey:6MWKP >nul&cscript //nologo ospp.vbs /inpkey:NMMKJ-6RK4F-KMJVX-8D9MJ-6MWKP >nul&set i=1

:server

if %i%==1 set KMS_Sev=kms7.MSGuides.com

if %i%==2 set KMS_Sev=kms8.MSGuides.com

if %i%==3 set KMS_Sev=kms9.MSGuides.com

if %i%==4 goto notsupported

cscript //nologo ospp.vbs /sethst:%KMS_Sev% >nul&echo ============================================================================&echo.&echo.

cscript //nologo ospp.vbs /act | find /i "successful" && (echo.&echo ============================================================================&echo.&echo #My official blog: MSGuides.com&echo.&echo #How it works: bit.ly/kms-server&echo.&echo #Please feel free to contact me at msguides.com@gmail.com if you have any questions or concerns.&echo.&echo #Please consider supporting this project: donate.msguides.com&echo #Your support is helping me keep my servers running everyday!&echo.&echo ============================================================================&choice /n /c YN /m "Would you like to visit my blog [Y,N]?" & if errorlevel 2 exit) || (echo The connection to my KMS server failed! Trying to connect to another one... & echo Please wait... & echo. & echo. & set /a i+=1 & goto server)

explorer "http://MSGuides.com"&goto halt

:notsupported

echo.&echo ============================================================================&echo Sorry! Your version is not supported.&echo Please try installing the latest version here: bit.ly/aiomsp

:halt

pause >nul