Category Archive for 'Unix'


Tuesday, September 11th, 2007

I was talking with one of my Unix administrator friends yesterday that had never heard of /usr/bin/yes before. I have to admit I was a little surprised at first, but when you think about it, /usr/bin/yes is hardly ever used these days. To a younger administrator used to having a -y or -f flag on […]

Moving Up on Mini-Scripting

Monday, September 10th, 2007

After my previous post on ad hoc scripting I had an example come up in my own work. I needed to search through some web logs for all hits in August to three servers from a pair of IP addresses. Below is the actual command line script I used, except I changed some identifying information […]

Scripting From the Command Line

Wednesday, September 5th, 2007

One of the techniques I use to be effective at Unix systems administration is scripting from the command line. If you understand Bourne shell’s for-loops and while statements, it is just one small step from only using them inside scripts to using them on the command line as part of an ad hoc mini-script. It […]

Debugging Connectivity Problems

Tuesday, August 21st, 2007

The Application is down! No, wait! Our Unix administrators just checked the server and it is running. They swear by it, and say it is the network team’s equipment dropping packets. The network team checks their systems and swear they are passing the traffic, and it must be an application configuration issue. The application folks, […]

Secure FTP in All its Forms

Saturday, August 18th, 2007

It is the File Transfer Protocol. FTP has been an important part of the Internet for more than 20 years. Businesses depend on it to transfer data from system to system and from business to business. In today’s world of SOX, HIPPA, PCI, and other standards and regulations companies are not only required to get […]