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Tag Archives: switch

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Technology Insights

cut – Represent A Tab As The Delimiter With Linux cut Command

InsightsBy alexJanuary 20, 2013Leave a comment

I have been using the cut command a lot recently to shed extra data from large text files. I typically use cut with a specific delimiter by activating the -d switch and I thought that the -d switch was required. It turns out that -d is not required and by default -d actually defaults to…

Technology Insights

Do Not Save Output Of wget Post Data

InsightsBy alexNovember 9, 2012Leave a comment

If you are putting together a script that uses wget to post data to various URL’s it is likely that you do not want wget to save the response back from the server in files. You can easily get around this by specifying the output file that wget save to with the -O switch. Below…

Information Security

SELinux prevented ruby from reading files stored on a NFS filesytem

SecurityBy alexMay 3, 2011Leave a comment

While working on a server farm for a client I kept running into some issues with one of the servers. The issue appeared to be a single CentOS Linux server in a cluster of ten CentOS Linux servers configured exactly the same as the other nine CentOS Linux servers was having issues writing to a…

Technology Insights

Linux Sort By Date, List Files In A Directory By Date On A Linux Server

InsightsBy alexMarch 25, 2011Leave a comment

It can be useful on a Linux server to sort all of the files in a directory by date. Sometimes you may want to backup files older than a certain date or you may just want to see what is in a directory and what date those files were created. Use the information below to…

Technology Insights

Count How Many Files Are In A Directory And All Sub Directories On A Linux Server

InsightsBy alexJanuary 1, 20114 Comments

Counting files in Linux is fairly easy by simply listing the files using ls and then using the wc application. Both the ls application and the wc application are core Linux applications and should be installed by default on your server. One thing that I had forgotten how to do was how to count all…

Technology Errors

The Disk Is Write Protected Error While Formatting SD Memory Card

ErrorsBy alexDecember 31, 20107 Comments

When attempting to format a SD memory card on your Windows computer it is possible to receive an error which states that the disk is write protected. Resolving this problem is typically very easy and simply requires you to slide a mini switch on the side of the SD card to the unlocked position. Below…

Technology Insights

Use wget To Download All PDF Files Listed On A Web Page, wget All PDF Files In A Directory

InsightsBy alexDecember 22, 20102 Comments

Earlier tonight I was working on a project for a customer that wants to translate the Hebrew Interlinear Bible into English which obviously has been done many times before. This customer however has some translations that he wants to make for himself so I needed to find a Hebrew Interlinear Bible in text or PDF…

Technology Insights

How To Show The uptime On A Cisco Catalyst 2950

InsightsBy alexNovember 28, 2010Leave a comment

While working on the computer shop network I had to modify the configuration on our switch which is a Cisco Catalyst 2950. After making a bunch of changes I was testing things to make sure all was working as expected however after taking a break and logging back into the 2950 it appeared that all…

Technology Errors

Cisco Catalyst 2950: When no shut One VLAN The Other VLAN Goes Down

ErrorsBy alexNovember 27, 20101 Comment

A couple days ago I was working on the network at the computer shop and ran into an issue configuring the Cisco Catalyst 2950 switch we have on part of the network. The goal was to set up three VLAN’s to segregate traffic on three segments of the network that each have their own purpose.…

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