time
como em
tom.oconnor@charcoal-black:/tmp$ time ls -lah
total 20K
drwxrwxrwt 26 root root 4.0K 2012-04-11 15:28 .
drwxr-xr-x 23 root root 4.0K 2012-04-03 15:01 ..
real 0m0.003s
user 0m0.010s
sys 0m0.000s
Legal, né?
Do time
manpage
TIME(1) TIME(1)
NAME
time - run programs and summarize system resource usage