Author: admin

How to remove a bad disk from LVM2

While doing a little house cleaning on a VM, I discovered I was unable to reboot it.  Basically, I had a logical volume that was rather large and wanted to remove it.  I used the lvremove to remove the logical volume that spanned across two hard drives. There was no other logical volume on those drives.  Shutdown the server and...Read More »

Convert OVFs to an OVA without the ovftool.exe

VMware requires you to have an account to logon and download a free tool called "VMware OVF Tool".  That alone is not annoying.  What is annoying is that the tool is extremely slow.  There is a much faster way to create an OVA without the need of this tool. Using the ovftool is easy enough, the following is an example...Read More »

NFL Pick ‘Em buildSchedule.php for any season

I have been playing around with the buildSchedule.php component of NFL PHP Pick 'Em as this is the component that makes it all possible to generate tables needed to create the SQL script to import into the new season.  My previous post on this subject required a spreadsheet, which never really was necessary.  Even though the output filename contains a...Read More »

NFL Pick ‘Em for 2019 Season

NFL PHP Pick 'Em is a free php web app that allows you to host a weekly NFL pick 'em football pool on your website.  This fantastic tool replaced the use of spreadsheets.  There was a time that this tool was not supported.  However, I just checked out the www.phpickem.org website it is is updated for 2019. I wish I...Read More »

Automatically clean /tmp or /var/tmp files that are in protected PrivateTmp directories in CentOS / RHEL 7

With CentOS/RHEL 6 there was a function called tmpwatch that was launched /etc/cron.daily/tmpwach This process has changed in CentOS/RHEL 7. There is a system target that runs daily: system-tempfiles-clean.timer. Although tmpwatch does a pretty good job in cleaning out the /tmp or /var/tmp files, it does not by default clean out the /tmp/systemd-private directories as these are secure.  There are…

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Install CentOS 7 on a GPT labeled disk

For one reason or another it was difficult to find the "complete" answer to installing CentOS 7 on a GPT labeled disk.  For the most part the answer was too complicated, incomplete, or inaccurate. After some trial and error the answer turns out to be a simple one. Process Basically, insert your CD/DVD for the install When presented with this...Read More »

Extend the swap logical volume size

Extend the swap size in a logical volume may be needed.  Assume that there is a swap partition that requires an additional 1G of space.  The following process should work on a CentOS 7 Linux install. Assuming that the disk space is available, use lvextend will add 1G, disable and flush out the existing swap space.  It may take some...Read More »

Root Login Permission Denied on CentOS7

A system that was a fresh installation of CentOS 7 Linux was just completed. After all the updates, the user began to install an application. After some time, the user logged out of the system and could not log back into it. As a root user, the administrator was unable to access the virtual machine even via console. This eliminated…

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