It had been awhile since I have installed NRPE or Nagios Remote Plugin Executor running through xinetd so once I thought I had everything configured I attempted to restart xinetd but NRPE was not working properly. Below I describe the error in more detail along with how I resolved the issue. In the below example the server was running CentOS Linux.
I was contacted by a client last week regarding a monitoring server they have deployed. One of the applications they have gathering data from this server is Cacti. Anyhow they were able to login to Cacti but the graphs were not displaying. After logging into the server, which is running CentOS Linux, I saw the error clearly in the Litespeed logs. Below I describe the error in more detail as well as how to resolve this problem if you run into it.
Recently a Dell computer running Windows XP Home Edition was dropped off at our computer shop to be repaired. The computer would not boot because it appeared that numerous Windows system files were corrupted. After some initial troubleshooting I booted to the Windows Recovery Console in an attempt to copy backups of the system files to the active locations however when I attempted to issue the copy commands from the Recovery Console I received an error of “Access Denied”. This problem can likely be fixed by running chkdsk as shown below.
For some reason today I could not scan an item on our Brother MFC-5890CN printer to my Windows 7 laptop today at the computer shop. It has been a couple weeks since I needed to scan something to my computer however it has never had a problem in the past. Today though when I attempted to scan a document using the Brother ControlCenter3 software it failed to connect to the Brother printer. The interesting thing is that when I attempted to configure the device remotely using the same Brother ControlCenter3 software it worked without an issue. I initially thought it was some form of firewall issue either on my computer or on the firewall at the computer shop however that was not the issue. Below I describe the error in more detail as well as how I resolved the problem.
LiteSpeed: [STDERR] /usr/lib/ruby/site_ruby/1.8/ rubygems/custom_require.rb:31:in `gem_original_require’: no such file to load — lsapi (MissingSourceFile)
After restarting LiteSpeed on a server used to develop various Ruby applications there was an error in the LSWS logs. It should be pointed out that the below error was received after straightening out a Ruby installation problem that the server had. The issue was two versions of Ruby were installed with one being installed via source and the other being installed via the Yum Package Manager on this CentOS server. Once the Ruby installation issue was resolved I thought that Rubygems and all of the proper gems had been installed though that was not the case as explained in the below resolution.