Snort is included with SuSE but not Red Hat. If you need it (or you want to upgrade), download the source distribution from  http://www.snort.org and unpack it:
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$ tar xvpzf snort-*.tar.gz
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Then compile it:
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$ cd `ls -d snort-* | head -1`<br />
$ ./configure<br />
$ make
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and install the binary and manpage as root:
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# make install
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Next, create a logging directory. It should not be publicly readable, since it will contain potentially sensitive data:
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# mkdir -p -m go-rwx /var/log/snort
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Finally, install the configuration files and rules database:
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# mkdir -p /usr/local/share/rules<br />
# cp etc/* rules/*.rules  /usr/local/share/rules<br />