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How can I use TCPDUMP to determine the top talker on my network?

tcpdump -tnn -c 20000 -i eth0 | awk -F “.” ‘{print $1″.”$2″.”$3″.”$4}’ | sort | uniq -c | sort -nr | awk ‘ $1 > 100 ‘ download in bash script top-talker.sh.txt-remove download and rename the file t-...

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How to backup MySQL databases

rm -f /backup/mysql* ### System Setup ### BACKUP=/backup NOW=$(date +”%d-%m-%Y”) ### MySQL Setup ### MUSER=”mysqluser” MPASS=”password” MHOST=”localhost” MYSQL=”$(which mysql)” MYSQLDUMP=”$(which...

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Manage Time in Ubuntu Through Command Line

Manage Time in Ubuntu Through Command Line Posted in configuration by hs on December 6, 2007 What if you would like to manage your computer’s time in Ubuntu? It’s easy if you are in a graphical desktop...

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Linux Tuning Parameters

KernelTo successfully run enterprise applications, such as a database server, on your Linux distribution, you may be required to update some of the default kernel parameter settings. For example, the...

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VI editor

Open vi filename Close/Quit/Quit without save :q = close the file, if you didnt modified anything :q! = close the file even u modified and dont want to save it : Save/ Save quit :wq = save and exit =...

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How To Install and Configure Squid as Transparent Proxy Server under Linux...

Squid is a proxy server and web cache daemon. It has a wide variety of uses: caching web, filtering traffic, caching DNS and other computer network lookups for a group of people sharing network...

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Trying to drop a DDoS attack using TTL and Length in iptables

Considering that there is a fairly big amount of DDoS attacks going around and not so many free tools available to work against this on a server level everyone will try to get the best of what he has...

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How to install MRTG under Linux

1. Introduction MRTG (Multi Router Traffic Grapher) is an application that allows us to observe the traffic of a network. It generates html pages with graphs which are refreshed according to our...

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how to Setup of VSFTPD with virtual users

If you are hosting several web sites, for security reason, you may want the webmasters to access their own files only. One of the good way is to give them FTP access by setup of VSFTPD virtual users...

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How to Install & Configure Vsftpd on RHEL/CentOS/Ubuntu/Fedora with Chroot users

How to Install and Configure Vsftpd Ftp Server on RHEL 6/ CentOS 6.2/ Ubuntu 11.10/ Fedora /Debian. VSftpd (Very Secure FTP Daemon) is an FTP server for Linux distributions. Vsftpd is the default FTP...

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How to configure Intervlan Routing Through Router

********************************* Requirements:           Three switches 2960           One router           One DNS server           Six PCs           Three subnets for each VLAN      subnet mask:(11...

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How To Reset Router’s Password

step1: go to roter’s CLI mode, and reload it            Router#reload            Proceed with reload? [confirm] step2: during reloading press Ctrl+break            monitor: command “boot” aborted due...

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