How to: ls -lh /proc/1/root/opt/my/service
total 8
drwxr-xr-x    3 root     root        4.0K Sep  2 15:51 node_modules
-rwxr-xr-x    1 root     root         415 Sep  8 00:52 server.js
```

Some of the useful debugging commands include `cat /proc/
/cmdline`, `ls -l /proc/
/cwd`, `cat /proc/1/environ`, `cat /proc/
/limits`, `cat /proc/
/status` and `ls -l /proc/
/fd`.