hiding system command results in ruby

You can use the more sophisticated popen3 to have control over STDIN, STDOUT and STDERR separately if you like:

Open3.popen3("curl...") do |stdin, stdout, stderr, thread|  # ...end

If you want to silence certain streams you can ignore them, or if it's important to redirect or interpret that output, you still have that available.

ruby command system

To keep it working with system without modifying your command:

system('curl ...', :err => File::NULL)

ruby command system

Easiest ways other than popen:

Use %x instead of system. It will automatically pipe

rval = %x{curl ...}       #rval will contain the output instead of function return value

Manually pipe to /dev/null. Working in UNIX like system, not Windows
```
system "curl ... > /dev/null"
```

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