How to change the input and output path of the time command

UnitedKingdom

6/10/24, 2:15 PM

I want change i/o of the time command, lake the following commands, but they are wrong and do not work. How to do this correctly?

time echo hello > log

bash -c 'time echo hello' > log

echo $(time echo hello) > log

1 + 4

bash

scripts

waltinator

6/10/24, 2:26 PM

Read `man test`. `test` does not read STDIN, does not write STDOUT or STDERR, it just sets `$?` (`$STATUS`). What do you want to change?

steeldriver

6/10/24, 2:35 PM

@waltinator if the OP is using bash, then `help test` is likely more pertinent than `man test`. AFAIK both the bash shell builtin `test` and external `/usr/bin/test` *do* write to the standard error stream (and will do so in this case ex. `test: echo: unary operator expected` or `/usr/bin/test: missing argument after ‘hello’`).

steeldriver

6/10/24, 2:37 PM

The bash `>` operator only redirects the standard output stream - if you want to redirect standard error to a file, see this similar question [Command output is not redirected to file](https://askubuntu.com/questions/1269712/command-output-is-not-redirected-to-file)

UnitedKingdom

6/10/24, 5:28 PM

I'm so sorry. test no. TIME

Score:-1

Ubuntu

knu

6/10/24, 6:20 PM

time (sleep 1 ; echo hello >log1) 2>log2

+ 1

UnitedKingdom

6/12/24, 8:52 AM

time (command) 2> outfile

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