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3

You can add the optional channel from the command line by running the command: rhn-channel –add –channel=rhel-x86_64-server-optional-7 You can run this command as root or use sudo.


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I generally install arpalert on a system for this purpose. It is a daemon, that uses libcap to watch traffic. It keeps a database of mac addresses per interface. It can also watch for some unusual types of events and send notifications. It keeps track of the last usage, and it will keep the database across reboots (in comparison to just setting up a ...


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At least the NS entry needs an A or AAAA record (and most likely a dot at the end unless your nameserver is to be called benu123.com.benu123.com).


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I'm answering my own question here, as I managed to fix it after a while. First thing I did was download the 'Recommended download (Floppy, CD & USB in one)' of Super Grub2 Disk from http://www.supergrubdisk.org/. This is a *.iso file, when it is finished downloading, rename it to an *.img. Next, plug an empty usb drive in your pc, download & ...


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Well as you noticed the reason Bind won't start is because of the error condition returned by the pre-start check: /usr/sbin/named-checkconf -z /etc/named.conf. You'll need to fix that. The lonely tilde character ~ at the end of your zone file is not a valid resource record and should be removed. You're declaring an in-zone name-server: ...


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Well to be fair, everyone says "arp -a", but I am not satisfied with this answer, since it only shows the known MAC addresses (and their corresponding IP). To list all addresses on a port, you'll need to change your current network configuration. We will use the bridge-utils package, but any other bridge implementation (eg.: OpenvSwitch) can do this. The ...


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Based on the slabtop output I would say that something is adding lots of temporary files somewhere and then deleting them. An additional twist is that some process is still holding the file handles to deleted files, so the files are not getting freed from the dentry. Since the files are marked as deleted, you cannot find them with the regular ls and similar ...



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