How to compare sql server databases structure and data ?

1. Install SQL Server Data Tools component https://msdn.microsoft.com/en-us/library/hh272686(v=vs.103).aspx in your Visual Studio version. 
2. Show Sql Server Object Explorer in Visual Studio - View -> SQL Server Object Explorer
3. Connect to server where one of your db is maintained in SQL Server Object Explorer Window
4. Right click on the database and choose "Schema compare.." or "Data comparison"

How to read \ write to windows registry in c# ?

Run application with administartor privilages.

How to create custom timestamp in PHP ?

How to list files that where modyfied in directory days ago

find . -type f -mtime -1 -exec ls -l {} \;

How to connect to other comp with remote destctop in Windows8 ?

Search comp with prase: mstsc. Run app: mstsc.exe. Give proper credentials.