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Remember that in Regular Expressions, a dot (period) is a meta-character to match &quot;any character&quot;.<br />
Whenever you want to match a real character that happens to be a meta-character, you have to escape that meta-character by preceding it with a backslash.<br />
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Hopefully this helps
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Remember that in Regular Expressions, a dot (period) is a meta-character to match "any character".
Whenever you want to match a real character that happens to be a meta-character, you have to escape that meta-character by preceding it with a backslash.

Hopefully this helps

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I'm grepping for spam URLs. &nbsp;I created a test file. &nbsp;I want to find &quot;.ru/&quot;<br />
<br />
# cat file.txt<br />
file.ru/<br />
fileru/<br />
<br />
# grep --regexp=&quot;[A-Za-z0-9].ru/&quot;<wbr /> file.txt<br />
file.ru/<br />
fileru/<br />
# grep &nbsp;-e &quot;.ru/&quot; file.txt<br />
file.ru/<br />
fileru/<br />
<br />
How do I get grep to look for the period in &quot;.ru/&quot;? &nbsp;
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I'm grepping for spam URLs.  I created a test file.  I want to find ".ru/"

# cat file.txt
file.ru/
fileru/

# grep --regexp="[A-Za-z0-9].ru/" file.txt
file.ru/
fileru/
# grep  -e ".ru/" file.txt
file.ru/
fileru/

How do I get grep to look for the period in ".ru/"?  

grep for a string with a .

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