greps v option will help print lines that lack blank lines and. We must note that we need to use the shopt command to set the extglob option. Lets look at how extra space is removed using the grep command besides the : space: keyword. Then after, we can use the colon( :) as a delimiter to extract the filename and content with whitespace using parameter expansion: filename="$ įinally, let’s take a look at the entire code that executes these operations for each output line using a while loop: $ echo "$(grep "foobar" file*)" | The escaping depends on the mode you are using. To ignore the case when searching, invoke grep with the -i option. This means that the uppercase and lowercase characters are treated as distinct. The \+ may be misleading - in -E mode, it matches a literal +, while without -E the \+ matches one or more preceding characters. The -w option tells grep to return only those lines where the specified string is a whole word (enclosed by non-word characters). It's better to use character classes :space:, or really just match a space. Let’s say that we capture each line from the grep output result in a variable entire_line. With the newer versions of GNU grep (that has the -z option) you can use this one liner: find. It is a gnu extension, not available everywhere.
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