Question

I have a command like this :

cat error | grep -o [0-9]

which is printing only numbers like 2,30 and so on. Now I wish to pass this number to sed.

Something like :

cat error | grep -o [0-9] | sed -n '$OutPutFromGrep,$OutPutFromGrepp'

Is it possible to do so?

I’m new to shell scripting. Thanks in advance

Answer 1

If the intention is to print the lines that grep returns, generating a sed script might be the way to go:

grep -E -o '[0-9]+' error | sed 's/$/p/' | sed -f - error