Why does running `time` and `/usr/bin/time` give different results?

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http://askubuntu.com – Why does running time and /usr/bin/time give different results? /usr/bin/time thomas@tbdesktop:~$ /usr/bin/time -f "Elapsed time:%E" wc /etc/hosts 9 25 224 /etc/hosts Elapsed time:0:00.04 time thomas@tbdesktop:~$ time -f "Elapsed time:%E" wc /etc/hosts -f: command not found real 0m0.079s user 0m0.052s sys 0m0.024s My path is as follows. As far as I can see, there is only one time executable in the path. thomas@tbdesktop:~$ echo $PATH /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games thomas@tbdesktop:~$ find / -name time 2> /de (HowTos)