How to start SQL Server in single user mode : SQL Server 2012

Through GUI
If there is a requirement to start SQL Server in single user mode, do following steps

• Open SQL Server configuration Manager from SQL Server 2008 à Configuration Tool
• Browse SQL Server Services
• Open SQL Server Service properties from Right click on particular instance service
• Go to Advance tab
• Modify the startup parameter and put –m; at the starting of Value like below image

• Click Apply and Click OK.
• And then start SQL Server instance service.
• SQL Server instance will be started in single user mode.

Through Command Line
Execute below command through command line and that will start SQL Server in Single User Mode

Default instance
sqlservr.exe -m

With Instance Name
sqlservr.exe -m -s <Instance Name>