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Dell SUU 6.5.3.25 for Linux returns no results

Bit of an odd one this, but I felt worth blogging about.
The latest Dell SUU (6.5.3.25) doesn’t seem to be able to detect applicable updates when it’s run on a Linux system.
You get the message:

Now, I know this isn’t true; because the current BIOS version is 3.0.0 and the one in the SUU repository is … Read more »

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Install and run Wireshark on the command line (CentOS 5.2)

Using CentOS 5.2 or Red Hat Enterprise Linux 5, install and run Wireshark (formerly Ethereal) over the command line.
Install Wireshark:

Run a capture:

This command will run Wireshark/Ethereal, capture on the eth1 interface and output the data to /yourhomedir/mycapture.pcap
Why would you want to do this? If you want to capture packets from a headless or remote Linux … Read more »

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Control user access to SSH

Got a shiny new Linux box on your network but don’t want all your users connecting to it via SSH? Control access by editing the SSH configuration file and using the AllowUsers directive like so:

To add multiple entries, either separate users with a space, or write an entirely new line: