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→Grep with blanks
==Grep with blanks==
==Grep with blanks==
cat dig_output.txt | grep -E 'IN[[:blank:]]A'
cat dig_output.txt | grep -E 'IN[[:blank:]]A'
== Grep remove comments and blank lines ==
<syntaxhighlight lang="bash">
cat file.txt | grep -v ^\#|grep .
</syntaxhighlight>