Displaying the most recent of 30 posts written by

Vince

Find BIOS version using Ubuntu

I found this really simple way of finding the installed BIOS version on an Ubuntu PC without having to reboot. Simply execute the following command in a terminal session and scroll through the output until you find the BIOS section. sudo dmidecode -s bios-version For more system information, just scroll through the output until you […]

Ubuntu 10.10 SSH login message fix

Do you get two welcome messages when logging in to your Ubuntu 10.10 host? I have experienced it on hosts upgraded from 10.04 and on freshly built hosts from the downloaded CD-ROM images. The problem can be easily fixed using… sudo rm /etc/motd.tail If you are still using password based login for SSH, consider using […]

Securing the list of last logged in users

The command ‘last‘ lists the times and dates of successful logins. The command ‘lastb‘ lists unsuccessful attempts. I found that both unnecessarily had public read access on most of my Ubuntu servers. Two log files provide the data used by last and lastb. Both can be secured by changing the permission to 660. sudo ls […]

Restricting access to ftpd

Whether the ftp daemon is in use or not on a Linux host, it’s a good idea to restrict the system user accounts from using it. Any user ID that is in /etc/passwd that is not permitted to use ftp should be copied to /etc/ftpusers. The following commands for Ubuntu create the file with a […]

Wireshark missing interfaces on Ubuntu 10.10

The old Dell laptop that I use for packet sniffing was in need of a rebuild after I had been experimenting with Zabbix. In hindsight, I shouldn’t have used the laptop that has become my network toolkit. I had well and truly messed it up and I was desperate to get it operational again. Ubuntu […]

Scheduling automatic updates to save money

I had an unlimited download account with my previous Internet Service Provider and I never worried about what time of day I would download a CD-ROM ISO or system update. However, since changing to PlusNet I am now on a 60GB per month download limit as unlimited accounts are now a thing of the past. […]

Camrivox Flexor 500 SIP Telephone

I recently purchased three Flexor 500 telephones to use with my new FreeSwitch installation at home. So far, I am quite pleased with the telephones although I am still in a process of discovering their capabilities. It appears that these phones are popular with VoIP providers that sell service to end users with a preconfigured […]

Choosing a rural broadband provider

I have recently moved home and I decided that after nearly eight years with PIPEX it was time to look around and see if it was possible to find a better rural broadband provider. PIPEX provided the service that I needed for many years. But after multiple takeovers, the service and the customer support deteriorated. […]

Wireshark missing interfaces on Ubuntu 10.04

I have been using Wireshark for some time on my Vista laptop but I couldn’t get it to work on my smaller Ubuntu laptop. When an update was installed today for Wireshark on my Windows machine I decided that now was the time to fix the problem on my old Ubuntu laptop. It was a […]

Compiling cURL with SSL on Ubuntu 10.04

I was having problems compiling the latest source of cURL on a freshly installed Ubuntu 10.04 host. The ./configure for cURL refused to find OpenSSL despite it being installed. After reading the cURL FAQ I checked to see if I had libssl installed on my machine and I found that it wasn’t there. The library […]