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I tried to redirect the output of the time command, but I couldn't:
$time ls > filename real 0m0.000s user 0m0.000s sys 0m0.000s In the file I can see the output of the ls command, not that of time. Please explain, why I couldn't and how to do this.
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On a command line, redirection is the process of using the input/output of a file or command to use it as an input for another file. It is similar but different from pipes, as it allows reading/writing from files instead of only commands. Redirection can be done by using the operators > and >> .
To redirect the output of a command to a file, type the command, specify the > or the >> operator, and then provide the path to a file you want to the output redirected to. For example, the ls command lists the files and folders in the current directory.
Input/Output (I/O) redirection in Linux refers to the ability of the Linux operating system that allows us to change the standard input ( stdin ) and standard output ( stdout ) when executing a command on the terminal. By default, the standard input device is your keyboard and the standard output device is your screen.
In Linux, for redirecting output to a file, utilize the ”>” and ”>>” redirection operators or the top command. Redirection allows you to save or redirect the output of a command in another file on your system. You can use it to save the outputs and use them later for different purposes.
no need to launch sub shell. Use a code block will do as well.
{ time ls; } 2> out.txt or
{ time ls > /dev/null 2>&1 ; } 2> out.txt If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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