how do i grep

You could try....

grep -o "1.1.1.1"  * >dump

Select allOpen in new window

By default grep will show the line which matches the given pattern/string, but if you want the grep to show out only the matched string of the pattern then use the -o option.

The syntax of the command as shown:

grep "1.1.1.1" * >dump

You are looking for 1.1.1.1 in any file and attempting to send the results to dump.

Using the ">" operator will overwrite each time.  Try using the ">>" to append. There should also be a space between the ">" and the file name "dump".

My guess is that you are getting results like 1.1.1.10, 1.1.1.11, etc.  To get just 1.1.1.1 try this:

grep -w "1.1.1.1" * >> dump

Do you have sample data, result you are getting and what you are expected to see?

Also, grep will see the periods or dots as a regular expression.

Try this:

grep -w '1.1.1.1' *

with single quotes telling grep not to expand regular expressions.

grep -o '1.1.1.1' *>test.log

grep -w 1.1.11 *>test.log

sudo grep -o "1.1.1.1" * > dump.log  is producing this output

10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131
10.212.10.2-20140221.log:141.131



sudo grep -w "1.1.1.1" * > dump.log is also not producing the wanted results.  

It appears both are reading the below as 1.1.1.1.  Any ideas?

10.212.10.2-20140221.log:Feb 21 04:48:35 10.212.10.2/10.212.10.2 %ASA-6-302014: Teardown TCP connection 510577569 for vlan1510-outside:141.131.19.197/88 to vlan510-inside:10.212.10.106/58769 duration 0:00:00 bytes 1684 TCP FINs

did you tried with single quotes

grep '^[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}$' file.txt

Did you try single quotes as suggested by Savone in ID: 39883121

grep "1\.1\.1\.1$"  * > dump.log

Try out these one.

I hope its unique LOL

grep "1\.1\.1\.1$"  * > dump.log  resulted in this Illegal variable name.

So, what does
grep -w '1.1.1.1' *  > dump.log
give?

savone is right.
the decimal points are seen as wild cards so you are looking for
1- anychar - 1 - any char - 1 - any char - 1 - anything else..

141.131.19.197 falls into this category quite nicely so is being picked out as a positive result.

putting the string in single quotes will stop the dots from being interpreted as wild cards and they will be treated as you intended. ie as dots.

Because grep treats the dot and dash as syntax switch... so you'd have to instruct the shell to treat your arguments as literal ... to do that

$ grep -- '1.1.1.1' *

The double dash (--) tells the system to treat everything behind it as "literal" and NOT switches. Try this and update us if it works for you.