feat: add linux course diagnostics

sandbox.py

@@ -75,6 +75,17 @@ COMMAND_INDEX = {
     "python3": "/usr/bin/python3",
 }
 
+SUPPORTED_COMMANDS = {
+    "alias", "apt", "awk", "bash", "bc", "cat", "cd", "chmod", "chgrp", "chown",
+    "clear", "cp", "crontab", "curl", "cut", "date", "df", "dig", "du", "echo",
+    "env", "export", "fdisk", "find", "free", "grep", "head", "history", "id",
+    "ifconfig", "ip", "journalctl", "kill", "last", "less", "ls", "lsof", "mkdir",
+    "more", "mount", "mv", "netstat", "nohup", "passwd", "ping", "pkill", "ps",
+    "pwd", "rm", "sed", "service", "sort", "ss", "stat", "su", "systemctl", "tail",
+    "tar", "top", "touch", "traceroute", "uniq", "uptime", "vi", "vim", "w",
+    "wc", "wget", "whereis", "which", "yum"
+}
+
 
 class LinuxSandbox:
     def __init__(self):
@@ -121,6 +132,9 @@ class LinuxSandbox:
         node = self.get_node(self.resolve_path(path))
         return bool(node and len(node.get("perm", "")) >= 3 and node["perm"][2] == "1" or node and "x" in node.get("perm_human", ""))
 
+    def supported_commands(self) -> set[str]:
+        return set(SUPPORTED_COMMANDS)
+
     def _perm_human(self, perm: str, is_dir: bool) -> str:
         mapping = {
             "0": "---", "1": "--x", "2": "-w-", "3": "-wx",