How to remove all characters after the first space using BASH + sed?

Question

bash

There is a line contained in the variable:
24kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.722941%
How to remove everything after the first space using sed? Those. leave 24kB.
Nubian question, but there is no urine to think.

Answer 1

you can get by with just bash: ${str%% *}
ideone.com/zVWyWA

Answer 2

Not sed, of course, but...

echo "24kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.722941%" | awk -F' ' '{print $1;}'

Answer 3

Another option:echo "line with spaces" | cut -d' ' -f1