ubuntu@ubuntu:~$ script
Script started, file is typescript
ubuntu@ubuntu:~$ time sudo gddrescue -f /dev/sda /dev/sdb ddb
sudo: gddrescue: command not found

real    0m0.011s
user    0m0.011s
sys     0m0.000s
ubuntu@ubuntu:~$ time sudo ddrescue -f /dev/sda /dev/sdb ddb
GNU ddrescue 1.23
Press Ctrl-C to interrupt
     ipos:   86372 MB, non-trimmed:        0 B,  current rate:  52559 kB/s
     ipos:  160041 MB, non-trimmed:        0 B,  current rate:  19030 kB/s
     opos:  160041 MB, non-scraped:        0 B,  average rate:  49198 kB/s
non-tried:        0 B,  bad-sector:        0 B,    error rate:       0 B/s
  rescued:  160041 MB,   bad areas:        0,        run time:     54m 12s
pct rescued:  100.00%, read errors:        0,  remaining time:         n/a
                              time since last successful read:         n/a
Finished                                     

real    54m13.300s
user    0m16.712s
sys     5m30.177s