Update DOC - Remove Linux except for first node.

Author: MikeRayMSFT

docs/linux/TOC.md

@@ -3,7 +3,7 @@
 ## [Release Notes](sql-server-linux-release-notes.md)
 # [Get Started](sql-server-linux-get-started-tutorial.md)
 ## [Get started with SQL Server on Linux](sql-server-linux-get-started-tutorial.md)
-## [Install SQL Server on Linux](sql-server-linux-setup.md)
+## [Install SQL Server](sql-server-linux-setup.md)
 ### [Provision an Azure VM](sql-server-linux-azure-virtual-machine.md)
 ### [Install on Ubuntu](sql-server-linux-setup-ubuntu.md)
 ### [Install on Red Hat Enterprise Linux](sql-server-linux-setup-red-hat.md)
@@ -15,33 +15,36 @@
 # [Develop](sql-server-linux-develop-overview.md)
 ## [Develop for SQL Server on Linux](sql-server-linux-develop-overview.md)
 ## [Connectivity libraries](sql-server-linux-develop-connectivity-libraries.md)
-## [Use Visual Studio Code with SQL Server on Linux](sql-server-linux-develop-use-vscode.md)
-## [Use Visual Studio (SSMS) with SQL Server on Linux](sql-server-linux-develop-use-ssms.md)
-## [Use Visual Studio (SSDT) with SQL Server on Linux](sql-server-linux-develop-use-ssdt.md)
-## [Development tutorials for SQL Server on Linux](sql-server-linux-connect-applications.md)
+## [Use Visual Studio Code](sql-server-linux-develop-use-vscode.md)
+## [Use Visual Studio (SSMS)](sql-server-linux-develop-use-ssms.md)
+## [Use Visual Studio (SSDT)](sql-server-linux-develop-use-ssdt.md)
+## [Development tutorials](sql-server-linux-connect-applications.md)
 # [Manage](sql-server-linux-management-overview.md)
 ## [Management tasks for SQL Server on Linux](sql-server-linux-management-overview.md)
-## [Use SSMS to Manage SQL Server on Linux](sql-server-linux-manage-ssms.md)
-## [Use PowerShell to Manage SQL Server on Linux](sql-server-linux-manage-powershell.md)
-## [Configure SQL Server on Linux with mssql-conf](sql-server-linux-configure-mssql-conf.md)
-## [Monitor SQL Server on Linux with dmvtool](sql-server-linux-dmv-tool.md)
-# [Business continuity and disaster recovery ](sql-server-linux-backup-overview.md)
+## [Use SSMS to Manage](sql-server-linux-manage-ssms.md)
+## [Use PowerShell to Manage](sql-server-linux-manage-powershell.md)
+## [Configure with mssql-conf](sql-server-linux-configure-mssql-conf.md)
+## [Monitor with dmvtool](sql-server-linux-dmv-tool.md)
+# [Configure Business continuity](sql-server-linux-backup-overview.md)
+## [Business continuity and disaster recovery on Linux](sql-server-linux-backup-overview.md)
 ## [Backup and restore](sql-server-linux-backup-and-restore-database.md)
-## [Restore a SQL Server database from Windows to Linux](sql-server-linux-restore-database.md)
-## [Configure high availability and disaster recovery for SQL Server on Linux](sql-server-linux-configure-high-availability-and-disaster-recovery.md)
-### [Configure SQL Server on Linux shared disk cluster](sql-server-linux-shared-disk-cluster-configure.md)
-#### [Configure SQL Server shared disk cluster (RHEL 7.2)](sql-server-linux-shared-disk-cluster-red-hat-7-configure.md)
-### [Operate SQL Server on Linux shared disk cluster](sql-server-linux-shared-disk-cluster-operate.md)
-#### [Operate SQL Server shared disk cluster (RHEL 7.2)](sql-server-linux-shared-disk-cluster-red-hat-7-operate.md)
+## [Restore a SQL Server database](sql-server-linux-restore-database.md)
+## [Configure high availability and disaster recovery](sql-server-linux-configure-high-availability-and-disaster-recovery.md)
+### [Configure shared disk cluster](sql-server-linux-shared-disk-cluster-configure.md)
+#### [Configure RHEL 7.2 shared disk cluster](sql-server-linux-shared-disk-cluster-red-hat-7-configure.md)
+### [Operate shared disk cluster](sql-server-linux-shared-disk-cluster-operate.md)
+#### [Operate RHEL 7.2 shared disk cluster](sql-server-linux-shared-disk-cluster-red-hat-7-operate.md)
 # [Migrate](sql-server-linux-migrate-overview.md)
+## [Migrate SQL Server on Linux](sql-server-linux-migrate-overview.md)
 ## [Export and Import a BACPAC with SqlPackage](sql-server-linux-migrate-sqlpackage.md)
 ## [Export and Import a BACPAC with SSMS](sql-server-linux-migrate-ssms.md)
 ## [Migrate with SQL Server Migration Assistant](sql-server-linux-migrate-ssma.md)
-## [Bulk copy with bcp to SQL Server on Linux](sql-server-linux-migrate-bcp.md)
-## [Use SQL Server Integration Services (SSIS) to load data](sql-server-linux-migrate-ssis.md)
+## [Bulk copy with bcp](sql-server-linux-migrate-bcp.md)
+## [Load Data with (SSIS)](sql-server-linux-migrate-ssis.md)
 # [Security](sql-server-linux-security-overview.md)
-## [Security limitations](sql-server-linux-security-overview.md)
+## [Security limitations on Linux](sql-server-linux-security-overview.md)
 ## [Get started with security features](sql-server-linux-security-get-started.md)
 # [Troubleshoot](sql-server-linux-troubleshooting-guide.md)
+## [Troubleshoot SQL Server on Linux](sql-server-linux-troubleshooting-guide.md)
 # [Optimize Performance](sql-server-linux-performance-get-started.md)
-## [Get started with performance features](sql-server-linux-performance-get-started.md)
+## [Optimize SQL Serve ron Linux](sql-server-linux-performance-get-started.md)