# xonsh > Python-powered, cross-platform, Unix-gazing shell. > Write and mix sh/Python code in Xonsh (pronounced conch). > More information: . - Start an interactive shell session: `xonsh` - Execute a single command and then exit: `xonsh -c "{{command}}"` - Run commands from a script file and then exit: `xonsh {{path/to/script_file.xonsh}}` - Define environment variables for the shell process: `xonsh -D{{name1}}={{value1}} -D{{name2}}={{value2}}` - Load the specified `.xonsh` or `.json` configuration files: `xonsh --rc {{path/to/file1.xonsh}} {{path/to/file2.json}}` - Skip loading the `.xonshrc` configuration file: `xonsh --no-rc`