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Professional Unix Shell Programming
Copr. 2004 Larry A. Walker
Unixinfo.org

time pipeline

If pipeline is omitted the user and system time for the current shell and completed child processes is printed on standard error. Otherwise, pipeline is executed and the elapsed time as well as the user and system time are printed on standard error.
$ time netstat -a
< command output follows>
< then the results of the time command >
real 0m0.24s
user 0m0.07s
sys 0m0.07s