Introduction: Xshell is a powerful and famous terminal simulation software, which is widely used for server operation, maintenance and management. Xshell supports SSH, SFTP, TELNET, RLOGIN and SERIAL functions. It provides industry-leading performance and powerful functions, and plays an irreplaceable role in free terminal simulation software. The Enterprise Edition has more professional functions, including: tabbed environment, dynamic port forwarding, user-defined key mapping, user-defined buttons, VB script and UNICODE terminal for displaying 2 byte characters and supporting international languages. Xshell provides many user-friendly functions that are not available in other terminal simulation software. These functions include Zmodem file upload and Zmo