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Calculating percentages in bash Dividing in bash will cause problems if the result is below zero. This is a problem when you’re trying to work out percentages. For example, if you simply want to divide 1 by 2 the result should be 0.5. However, bash returns the result 0: user@computer:~> echo $(( 1 / 2 […] Well, my new favorite approach is to pipe ifconfig into a single sed command 🙂 ifconfig | sed -n -e ‘s/:127\.0\.0\.1 //g’ -e ‘s/ *inet addr:\([0-9.]\+\).*/\1/gp’
So, how does it work? Well, there are two filters (aka scripts, ie the parameters after the -e flags). The first one, s/:127\.0\.0\.1 //g’, simply strips out all […] |
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