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Active FTP vs. Passive FTP Introduction One of the most commonly seen questions when dealing with firewalls and other Internet connectivity issues is the difference between active and passive FTP and how best to support either or both of them. Hopefully the following text will help to clear up some of the confusion over how to support FTP in a firewalled environment. This may not be the definitive explanation, as the title claims, however, I've heard enough good feedback and seen this document linked in enough places to know that quite a few people have found it to be useful. I am always looking for ways to improve things though, and if you find something that is not quite clear or needs more explanation, please let me know! Recent additions to this document include the examples of both active and passive command line FTP sessions. These session examples should help make things a bit clearer. They also provide a nice picture into what goes on behind the sc...

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= Yum groups and repositories = Yum supports the group commands   * grouplist   * groupinfo   * groupinstall   * groupremove   * groupupdate Groups are read from the "group" xml metadata that is optionally available from each repository. If yum has no repositories which support groups then none of  the group operations will work.  #yum grouplist    This will list the installed and available groups for your system in two    separate lists. If you pass the optional 'hidden' argument then all of     the groups which are set to 'no' in the group xml tag.   yum groupinfo groupname     This will give you detailed information for each group including:   description, mandatory, default and optional packages.       #yum groupinstall groupname      #yum groupupdate groupname   Despite their differing names both of these commands perform the same   func...

Bonding in RHEL 6 NIC Bonding in RHEL6   Solution Red Hat Enterprise Linux allows administrators to bind multiple network interfaces together into a single channel using the   bonding   kernel module and a special network interface called a   channel bonding interface . Channel bonding enables two or more network interfaces to act as one, simultaneously increasing the bandwidth and providing redundancy.  The behavior of the bonded interfaces depends upon the mode, either hot standby or load balancing service. Add caption             Steps for configuring bonding In this document we are configuring bond0 with interfaces  eth0  and  eth1 Step 1- Load Kernel module For a channel bonding interface to be valid, the kernel module must be loaded. To ensure that the module is loaded when the channel bonding interface is brought up, create a new file as root named...

Introduction This guide is intended to provide you with simple instructions on how to install Nagios from source (code) on Fedora and have it monitoring your local machine inside of 20 minutes. No advanced installation options are discussed here - just the basics that will work for 95% of users who want to get started. These instructions were written based on a standard Fedora Core 6--17 Linux distribution. What You'll End Up With If you follow these instructions, here's what you'll end up with: Nagios and the plugins will be installed underneath /usr/local/nagios Nagios will be configured to monitor a few aspects of your local system (CPU load, disk usage, etc.) The Nagios web interface will be accessible at http://localhost/nagios/ Prerequisites During portions of the installation you'll need to have root access to your machine. Make sure you've installed the following packages on your Fedora ...

apropos - search the manual page names and descriptions A very Usefull command to find Out the Manual pages to particular task.. Means we can find. how Many ways To do A task in Linux.. This is efficiency  of Linux OS. and this command will help Us to find the all ways to do a Task. for example this:------ [root@singh ~]# apropos network Socket (3pm)         - networking constants and support functions aseqnet (1)          - ALSA sequencer connectors over network avahi-autoipd (8)    - IPv4LL network address configuration daemon bssh (1)             - Browse for SSH/VNC servers on the local network bvnc (1)             - Browse for SSH/VNC servers on the local network byteorder (3)        - convert values between host and net...