'Track the time a command takes in UNIX/LINUX?

In UNIX/LINUX, is there an easy way to track the time a command takes?

linuxunixcommand-lineterminal


Solution 1:[1]

Yes, use time <command>, such as 

time ls

Consult man time for more options. Link.

Solution 2:[2]

Use

/usr/bin/time

instead that the time builtin in the bash: it is more configurable AFAIK.

e.g. /usr/bin/time --format=' \n---- \nelapsed time is %e'ls

Solution 3:[3]

Here is how a sleep of one second looks like, timed with time:

$ time sleep 1

real    0m1.001s
user    0m0.000s
sys 0m0.000s

Solution 4:[4]

The command time is built-in in the bash but it can also be installed on most distros by installing the package "time" (apt install time) and must be accessed by doing /usr/bin/time.

Using /usr/bin/time offers more convenient options like specifying a format:

time --format="Duration: %e seconds" sleep 3

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Paolo
Solution 2 Paolinux
Solution 3 Guillaume Chevalier
Solution 4 Jarchiii

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