How to pass command output as multiple arguments to another?

In the worst case (meaning problematic or unspecified file names), pass the matches to a subshell via xargs: where obviously the script inside the for loop could be arbitrarily complex. In the ideal case, the command you want to run is simple (or versatile) enough that you can simply pass it an arbitrarily long list of file names.

Can a command be used as an argument?

When working with the Linux command line, we use many commands that receive important data as arguments. In this tutorial, we’ll explore some scenarios on how we can use the output of programs as arguments to others. 2. Preparing Example Files

How to create a command string in Bash?

Here, we use the -I replace-string argument that replaces the occurrences of the replace-string with the name read from the input. Next, we use the bash command to create a command-string consisting of the grep command filtering the files that contain the string “choose me”.

Can a command use a FIFO as an argument?

Then, the commands use the name of this FIFO. Since awk accepts only a filename as an argument instead of simple words, let’s use this capability within an awk script to count the size of our two sets of files: Here, we’re separately listing the files greater and smaller than five bytes in two FIFOs.

How do I diff the output of two commands?

When diff opens these files, it’ll be connected to the read side of each pipe. The write side of each pipe is connected to the ls command. In Fish shell you have to pipe into psub. Here is an example of heroku and dokku config comparison with Beyond Compare:

Can a command be passed to another command?

Using process substitution or by grouping & piping , one can pass the output ( stdout) a set of commands as the input for another command. But is there the opposite ?

Where does the output go after an exec in Bash?

After the exec, the standard output of the script as a whole goes to /some/file. I seldom use this technique; I usually use the { …; } technique instead. Note: You do have to be careful with the braces notation.

How to capture the output of the first command?

To answer your question, it sounds like you want to capture the rate from the output of the first command, and then use the rate as a command line argument for the second command. Here’s one way to do that:

How to substitute the output of a command into the command line?

The tool for that is a command susbtitution. If you put a command inside $ (…) (dollar-parenthesis), its output is substituted into the command line.

What does s / pattern / Replacement / Command mean?

Explanation of the sed: The s/pattern/replacement/ command is to replace some pattern The pattern means: the line must start with “rate” ( ^rate) followed by any two character ( .. ), followed by 0 or more digits, followed by a %, followed by the rest of the text ( .*)

How to pass shell variables as command line?

I hope this helps… In this case, you set the environment variables prodName and users before calling the script. That is why you were able to use these variables inside your code. Here $1 will contain the first argument and $2 will contain the second argument. Thanks for contributing an answer to Stack Overflow!

What does it mean to have variable arguments in Java?

Variable Arguments (Varargs) in Java Last Updated: 18-10-2019 In JDK 5, Java has included a feature that simplifies the creation of methods that need to take a variable number of arguments. This feature is called varargs and it is short-form for variable-length arguments.

What are some examples of passing arguments in Python?

For example, a function might modify a global or static variable, modify one of its arguments, raise an exception, write data to a display or file etc. There are situations, in which these side effects are intended, i.e. they are part of the function’s specification.

How to pass arguments from one script to another in Bash?

Obviously using the appropriate command line switches (or not if applicable). If using the code as above, the value of $variable1 will be available in the other script as $1 (the 1st command line argument), while $variable2 will be available as $2. It sounds like you may actually want to source your file within the second script and not the first.

Can a command accept more than one argument?

For commands which accept a single command argument, that command can be sh or bash with multiple commands: As an aside, you generally don’t need an explicit exit because the command will terminate anyway when it has executed the script (sequence of commands) you passed in for execution.

How to save the output of one command?

FYI, if you don’t want to save the output to a file, but just view it in the terminal, use “-” instead of a filename to indicate stdout. wget also accepts stdin with the – switch. If you want to save the output in a file, use the -O switch.

What does the output of a shell do?

Several shells have a mechanism called command substitution that allows the output of a command to replace the command name. Let’s use this capability to copy the files greater than five bytes to the target folder:

How to pass command output as multiple arguments to another?