Linux FAQ Items Post: 302088233

3 More Discussions You Might Find Interesting

1. Post Here to Contact Site Administrators and Moderators

Unix for Dummies FAQ

I have created a small FAQ for the "Unix for Dummies" forum. Hopefully this will be useful, as there are questions which are asked (and answered) repeatedly. <A HREF="http://www.droflet.net/unix_dot_com_faq.html">http://www.droflet.net/unix_dot_com_faq.html

2. Shell Programming and Scripting

awk between items including items

OS=HP-UX ksh The following works, except I want to include the <start> and <end> in the output. awk -F '<start>' 'BEGIN{RS="<end>"; OFS="\n"; ORS=""} {print $2} somefile.log' The following work in bash but not in ksh sed -n '/^<start>/,/^<end>/{/LABEL$/!p}' somefile.log

3. Post Here to Contact Site Administrators and Moderators

Dead link in FAQ

Dead link from FAQ, then Technical FAQ: Senior Advisor - https://www.unix.com (Was about to suggest that a O/P read this FAQ).

LEARN ABOUT DEBIAN

synos

synos(1)							Mail Avenger 0.8.3							  synos(1)

NAME

       synos - guess operating system from TCP SYN fingerprint

SYNOPSIS

       synos [--mtu mtu] [--db path] syn-fingerprint

DESCRIPTION

       synos takes a SYN fingerprint, in the format described for the CLIENT_SYNFP environment variable in the avenger(1) man page, and outputs a
       guess as to the type of the client operating system.  synos makes use of the OpenBSD SYN fingerprint database (which is also repackaged
       with Mail Avenger).

   OPTIONS
       --mtu val
	   Certain operating systems set the initial TCP window size based on the maximum transmission unit, or MTU, of the network.  For such
	   operating systems, synos usually checks the window size using both the client's MSS option plus 40 bytes (for TCP and IP headers), or a
	   hard-coded MTU, which defaults to 1,500 bytes.  If either value works, the fingerprint is considered to match the operating system.
	   You can change the value 1,500 by specifying this option.  A value of 0 tells synos to use only the value derived from the MSS option.

       --db file
	   Specifies an alternate location for the SYN fingerprint database.

FILES

       /usr/local/share/pf.os
	   Default location of SYN fingerprint database.

SEE ALSO

       avenger(1), asmtpd(8)

       The Mail Avenger home page: <http://www.mailavenger.org/>.

       The OpenBSD home page: <http://www.openbsd.org/>.

BUGS

       The operating system type is determined by heuristics that are not always reliable.  Moreover, not all operating systems can be
       distinguished.  The database may not even contain a client's particular operating system and version.

       It is not hard to fool synos deliberately by changing TCP socket options or injecting raw packets onto the network.

AUTHOR

       David Mazieres

Mail Avenger 0.8.3						    2012-04-05								  synos(1)