Merge pull request #3667 from MicrosoftDocs/FromPublicRepo

Confirm merge from FromPublicRepo to master to sync with https://github.com/MicrosoftDocs/sql-docs (branch live)

Author: v-alje

docs/advanced-analytics/python/what-is-revoscalepy.md

@@ -119,7 +119,7 @@ You can run code that includes **revoscalepy** functions either locally or in a
 
 When running locally, you typically run a Python script from the command line, or from a Python development environment, and specify a SQL Server compute context using one of the **revoscalepy** functions. You can use the remote compute context for the entire code, or for individual functions. For example, you might want to offload model training to the server to use the latest data and avoid data movement.
 
-If you want to put a complete Python script inside the stored procedure, [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql), we recommend that you rewrite the code as a single function that has clearly defined inputs and outputs. Inputs and outputs must be **pandas** data frames. When this is done, you can call the stored procedure from any client that supports T-SQL, easily pass SQL queries as inputs, and save the results to SQL tables. For an example, see [In-Database Python Analytics for L Developers](../tutorials/sqldev-in-database-python-for-sql-developers.md).
+If you want to put a complete Python script inside the stored procedure, [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql), we recommend that you rewrite the code as a single function that has clearly defined inputs and outputs. Inputs and outputs must be **pandas** data frames. When this is done, you can call the stored procedure from any client that supports T-SQL, easily pass SQL queries as inputs, and save the results to SQL tables. For an example, see [In-Database Python Analytics for SQL Developers](../tutorials/sqldev-in-database-python-for-sql-developers.md).
 
 ### Using remote compute contexts
 
@@ -165,4 +165,4 @@ If you use Python Tools for Visual Studio, you can use IntelliSense to get synta
 
 ## See Also
 
-[Python tutorials](../tutorials/sql-server-python-tutorials.md)
+[Python tutorials](../tutorials/sql-server-python-tutorials.md)

docs/database-engine/configure-windows/database-engine-service-startup-options.md

@@ -29,6 +29,8 @@ ms.workload: "On Demand"
 
 > [!WARNING]  
 >  Improper use of startup options can affect server performance and can prevent [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] from starting.  
+>
+>  Start SQL Server on Linux with the "mssql" user to prevent future startup issues. Example "sudo -u mssql /opt/mssql/bin/sqlservr [STARTUP OPTIONS]" 
   
 ## About Startup Options  
  When you install [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)], Setup writes a set of default startup options in the [!INCLUDE[msCoName](../../includes/msconame-md.md)] Windows registry. You can use these startup options to specify an alternate master database file, master database log file, or error log file. If the [!INCLUDE[ssDE](../../includes/ssde-md.md)] cannot locate the necessary files, [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] will not start.  

docs/linux/sql-server-linux-troubleshooting-guide.md

@@ -115,6 +115,37 @@ For SQL dumps
    ```bash
    sudo ls /var/opt/mssql/log | grep .mdmp 
    ```
+   
+## Start SQL Server in Minimal Configuration or in Single User Mode
+
+### Start SQL Server in Minimal Configuration Mode
+This is useful if the setting of a configuration value (for example, over-committing memory) has prevented the server from starting.
+  
+   ```bash
+   sudo -u mssql /opt/mssql/bin/sqlservr -f
+   ```
+
+### Start SQL Server in Single User Mode
+Under certain circumstances, you may have to start an instance of SQL Server in single-user mode by using the startup option -m. For example, you may want to change server configuration options or recover a damaged master database or other system database. For example, you may want to change server configuration options or recover a damaged master database or other system database   
+
+Start SQL Server in Single User Mode
+   ```bash
+   sudo -u mssql /opt/mssql/bin/sqlservr -m
+   ```
+
+Start SQL Server in Single User Mode with SQLCMD
+   ```bash
+   sudo -u mssql /opt/mssql/bin/sqlservr -m SQLCMD
+   ```
+  
+> [!WARNING]  
+>  Start SQL Server on Linux with the "mssql" user to prevent future startup issues. Example "sudo -u mssql /opt/mssql/bin/sqlservr [STARTUP OPTIONS]" 
+
+If you have accidentally started SQL Server with another user, you will need to change ownership of SQL Server database files back to the 'mssql' user prior to starting SQL Server with systemd. For example, to change ownership of all database files under /var/opt/mssql to the 'mssql' user, run the following command
+
+   ```bash
+   chown -R mssql:mssql /var/opt/mssql/
+   ```
 
 ## Common issues
 
@@ -168,4 +199,4 @@ Support is available through the community and monitored by the engineering team
 - [Stack Overflow](http://stackoverflow.com/questions/tagged/sql-server): Ask development questions
 - [MSDN Forums](https://social.msdn.microsoft.com/Forums/en-US/home?category=sqlserver): Ask technical questions
 - [Microsoft Connect](https://connect.microsoft.com/SQLServer/Feedback): Report bugs and request feature
-- [Reddit](https://www.reddit.com/r/SQLServer/): Discuss SQL Server
+- [Reddit](https://www.reddit.com/r/SQLServer/): Discuss SQL Server