03-06-2009
Searching for instance of specific IP in a file
I have a similar question, so I'll post it here.
I have a script that blocks IPs, but checks first to see if the given IP exists in a file before proceeding. In one case, it's /etc/mail/access (Sendmail). The format is generally:
11.22.33 REJECT or SOME MESSAGE
Now, say I log an IP of 11.22.3, when I egrep for it, it will also match 11.22.33, which I don't want.
So I'm trying to figure out how to limit the egrep search for only that IP - establishing a boundary on the search, which I'm not able to figure out.
thanks.
Last edited by forrie; 03-06-2009 at 12:23 PM..
Reason: typo
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XZGREP(1) XZ Utils XZGREP(1)
NAME
xzgrep - search compressed files for a regular expression
SYNOPSIS
xzgrep [grep_options] [-e] pattern file...
xzegrep ...
xzfgrep ...
lzgrep ...
lzegrep ...
lzfgrep ...
DESCRIPTION
xzgrep invokes grep(1) on files which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), or bzip2(1). All options
specified are passed directly to grep(1).
If no file is specified, then the standard input is decompressed if necessary and fed to grep(1). When reading from standard input,
gzip(1) and bzip2(1) compressed files are not supported.
If xzgrep is invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1). The same applies to names lzgrep, lze-
grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils.
ENVIRONMENT
GREP If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1).
SEE ALSO
grep(1), xz(1), gzip(1), bzip2(1), zgrep(1)
Tukaani 2009-07-05 XZGREP(1)