Execute Linux shell commands on this machine. Input a valid JSON array or string of commands. Ensure paths are exact, use quotes for paths with spaces, and verify the directory structure. Combine commands logically and validate paths before execution. The tool can be invoked multiple times to check system state. Examples: {'commands': ['ls ProjectA/documentation']}, {'commands': ['mv 01_Projects/01_ProjectA/01_Code/main.py 01_Projects/01_ProjectA/01_Code/main_backup.py']}