cuml_benchmarks.ipynb tries and fails to run apt-get because of permissions

Expected behavior: Cells don't fail.
Actual behavior: First cell has a permission denied error

command
```
!apt-get update && apt-get install -y gcc
```

Actual results
```
Reading package lists... Done
E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)
E: Unable to lock directory /var/lib/apt/lists/
```