In-place processing with grep

Question

I\'ve got a script that calls grep to process a text file. Currently I am doing something like this.

$ grep \'SomeRegEx\' myfile.txt > myfile.txt.temp
$ m         


        

Answer 1

Store in a variable and then assign it to the original file:

A=$(cat aux.log | grep 'Something') && echo "${A}" > aux.log