Bash: How to trim whitespace before using cut

Pipe your command to awk, print the 3rd column, a space and the 4th column like this

<command> | awk '{print $3, $4}'

This results in:

12345 KB

<command> | awk '{print $3}'

if you want the naked number.

bash trim cut

tr helps here.

$ echo "Memory Limit:           12345 KB" | tr -s " " | cut -d " " -f312345

bash trim cut

You can use awk and avoid using any cut, sed or regex:

<command> | awk '/Memory Limit/{print $(NF-1)}'12345

CodeHunter