Quickly test connectivity from Azure Website to SQL DB

What if I am using a Linux-based app service plan, which command will help me, troubleshoot connectivity.

Thanks for the response But I believe `tcpping` will not be sufficient enough to test the database connectivity, better to use a posh script as below.

Note: upload the posh script to Azure web app using Kudo `Zip Push Deploy` or vs code editor in portal. then execute thescript as `Powershell -File ".\<ScriptFileName.ps1>`

# Define the necessary variables
$serverName = "test.database.windows.net"
$databaseName = "test"
$username = "<your username>"
$password = "<your password>"

# Construct the connection string
$connectionString = "Server=tcp:$serverName,1433;Initial Catalog=$databaseName;Persist Security Info=False;User ID=$username;Password=$password;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;"

# Load the .NET assembly
Add-Type -AssemblyName "System.Data"

# Create a new SQL connection
$connection = New-Object System.Data.SqlClient.SqlConnection
$connection.ConnectionString = $connectionString

# Open the connection
$connection.Open()

# Create a new SQL command
$command = $connection.CreateCommand()
$command.CommandText = "SELECT DB_NAME()"

# Execute the command and read the results
$reader = $command.ExecuteReader()
while ($reader.Read()) {
    Write-Output $reader[0]
}

# Close the reader and the connection
$reader.Close()
$connection.Close()

If connectivity is success, it will return the database name.

Thank you. 

For Linux use: nc -vz <address> <port>

TechCF In KUDU under Linux there is no `nc` command. However, tcpping tool is available.