Grep time command output

Question

Using time ls, I have the following output:

$ time ls -l 
total 2
-rwx------+ 1 FRIENDS None 97 Jun 23 08:59 location.txt
-rw-r--r--+ 1 FRIENDS None         


        

Answer 1

Look out.. bash has a built-in "time" command. Here are some of the differences..

# GNU time command (can also use $TIMEFORMAT variable instead of -f)
bash> /usr/bin/time -f%e ls >/dev/null
0.00


# BASH built-in time command (can also use $TIME variable instead of -f)
bash> time -f%e ls >/dev/null
-f%e: command not found

real    0m0.005s
user    0m0.004s
sys     0m0.000s