Even the best of us mess up and today I made a epic blunder on a customers computer. I did manage to fix the issue so I will document it quickly so that if any one else makes the same mistake they may not have to go through what I did to get it fixed. So I had a badly infected laptop with a host of programs which wouldn’t uninstall. Some of the classic registry-tune and health-optimize programs were installed and I had to remove them. To be perfectly honest I was working on many things at once and so in my distraction I saw a folder/program called PC Health. Sounds like another one of those annoying virus ridden fix up programs so I proceeded to force delete it along with all traces from the registry.
Earlier when attempting to install the request-log-analyzer gem on a CentOS Linux server I ran into some issues. I noticed that on one server I was able to install the request-log-analyzer gem without issue but on another server running the same version of CentOS and Ruby as the first server the attempt to install request-log-analyzer returned an error. The error was that the gem required a newer version of another gem.
I needed to install some python related packages for a project I was testing out. The particular project required html5lib and markdown2 to be installed using the easy_install command. First make sure that you have the python-setuptools packages installed so you can use the easy_install command. If you do not have this package installed you can follow the directions here to get easy_install working. Once the easy_install command is working properly run the commands below to install html5lib and markdown2.
I received the below error when attempting to install the memprof gem on a CentOS Linux server. The errors pointed out below could occur when attempting to install other packages as well though. Below I display a summary of the error output, the entire error output, and information on what to install to resolve the error. I noticed that on one server where the memprof gem installed without issue the gelf.h file was in the /usr/include/ directory however are the server that produced the error gelf.h was not installed.
Typically the “which” command is installed by default though depending on what Linux distribution and what packages you decided to install there is a possibility the command is not installed. Installing which is easy on any distribution as the package is literally just called “which”. Below is a brief explanation of the error you could get if which is not installed and information on how to install the which package using the yum package manager on CentOS.