Author: admin

Atlassian JIRA support for unsupported OpenJDK

admin •
Atlassian JIRA does not support OpenJDK. Oracle has changed it licensing for Oracle JDK.  With that in mind, the goal is to use OpenJDK as a replacement for the Oracle JDK. This is possible and easy to do. Search for your jira install %JIRA_HOME/jira/bin/check-java.sh.  On the line that contains "java version" change it to "openjdk version", then restart your install...Read More »

pihole becomes unresponsive

admin •

If pihole becomes unresponsive, one reason may be that the diskspace is full. The diskspace may become full from an excessively large pihole database and or /var/log entries.  In a recent case, both were the cause.  Stopping the services and truncating the logs in /var/log and deleting the database worked in this case.  The following logs were large, but I…

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pihole reset all stats

admin •

There may be a time where you want to have a fresh dashboard without the stats and logs.  A case maybe a misconfigured NIC that may dump millions of DNS queries into the logs.  Yup I have seen this happen. Whenever you need to reset the pihole stats and logs that display on the /admin dashboard, the following options will…

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Create systemd services for Atlassian Apps

admin •
While working with the Atlassian products over the years, a pattern emerges. Even though there are distinct differences in their setup and configurations, the installation process can be generalized. One of the post-installation considerations to make is in the manual creation of a service.  The benefit of a service is that it will automate the running of the application, rather...Read More »

CentOS 7 df command hangs

admin •
The df command is useful in reporting disk space usage.  However, recently encountered a system that would hang after issuing the df command.  A ctl c or ctl z would not escape this annoyance.  The issue was quickly resolved by reinstalling stystemd. After reinstalling systemd, the df command was reissued and was quite responsive. Source https://serverfault.com/questions/911811/centos-7-df-started-to-hangRead More »

The cd command in CentOS 7

admin •
I have been working in a CLI environment for many years, so the cd "change directory" command is nothing new to me; however, an accidental typo presented an unexpected result.  Instead of typing "cd .." which would transverse back one directory, a user typed only "cd" with the intention of pasting from the clipboard the rest of the path.  The...Read More »

VIM: Preserve File Date with Touch

admin •
I had a single file I needed to modify but didn't want to modify the date of the file.  It was a minor change to the file, so I wanted to maintain the file date for posterity.  In any case, I learned the vim does not provide this functionality, but touch would and quite easily.  With that said, I am...Read More »

Determine which processes are using swap in Linux

admin •
Some servers may have several applications, each running in their own allocated piece of RAM and SWAP.  It seems easy enough to use `top` to determine memory usage, but it wasn't so obvious (to me) as to how to determine swap usage.  A nifty little command called smem to the rescue. So what is smem?  It is a "Report memory...Read More »