drwxr-xr-x 1 root root 4096 Jun 17 08:50 .
drwxr-xr-x 1 root root 4096 Jun 17 08:50 ..
-rwxr-xr-x 1 root root 27269 Jun 17 08:50 l3plus_autotune.py
-rw-r--r-- 1 root root 2137 Jun 17 08:50 README.md
-rw-r--r-- 1 root root 29976 Jun 17 08:50 sv.txt
@Master-VRTJMB:~/bitmain-tools/scripts$ ./l3plus_autotune.py
/usr/bin/env: python: No such file or directory
@Master-VRTJMB:~/bitmain-tools/scripts$
Ah, good I asked. You seem to have installed a rather minimal Ubuntu VM with no python, but no problem. Do the following:
sudo apt-get install python2.7
While at it you might also want to install the required paramiko module:
sudo apt-get install python-paramiko
But already after your first step the error should look different (reporting that you need paramiko too).