How to add the Windows 10 ADMX Group Policy Templates

Before you get started you may want to download the ADMX templates discussed here so you can follow along.  Click HERE to be directed to the Microsoft website.  I suggest that you not only download the ADMX files Microsoft Administrative Templates for Windows 10 but also the associated guide from Microsoft. Once you have downloaded […]

Linux Oracle Database Connection Test Script

Database connection testing scripts are out there, but not all of them provide a one stop way to test more than 1 node of the RAC at the same time.  Sure you can do simple tests using “tnsping”, “nc -z” or even “telnet” to confirm the listener is up.  Actually testing a login is a […]

Quick Server Health Check On Login Using Bash Profile

I strive in being a proactive sysadmin/dba/app admin so I use a few methods to provide me critical data. For this post I’m going to cover the use of the .bash_profile and show how we can combine some commands to provide visual output so we can assess the server health each time you login. I […]

Oracle Exalogic vServer Hung – Running xm dump-core

Have you been tasked with capturing a dump of a VM? Are you running an Oracle VM implementation? Are you using an Oracle Exalogic? Here I’ll show you what options we have to use and my recommended methods to provide the data to support (assuming that is why you are attempting the capture of the […]

virtualbox

Compressing a Windows Guest Running In VirtualBox

VirtualBox is my favorite go to quick virtualization tool. Its versatile and can run on many host platforms as well as support many guest platforms (windows/linux/aix/solaris..). For those who can’t afford licensing for a VMware cluster, standing VirtualBox up on a beefy server and partitioning out its proc/mem is a perfect solution for a sandbox. […]

Linux Bash Script That Continues After Server Reboot

Today I would like to show you something that others have asked me alot about recently and that is the ability to run either or series of bash scripts or one bash script with multiple functions after a system has been rebooted. You might be wondering “Why would I want to do this?” A great […]

You (oracle) are not allowed to use this program (crontab)

Here is the message being faced on our x3-8 Exadata (Note that this can happen on any linux system): [root@ex01db01 etc]# su – oracle [oracle@ex01db01 ~]$ crontab -l You (oracle) are not allowed to use this program (crontab) See crontab(1) for more information Some MOS note that describe NON-ROOT users having difficulty using crontab: Non […]

MySQL Daemon – Timeout, unable to stop failed

Trying to stop that instance of MySQL? Getting this message: [root@mwlab01-mysql01~]# service mysqld stop Timeout error occurred trying to stop MySQL Daemon. Stopping mysqld: [Failed] Try adjusting your start/stop timeout values in your /etc/init.d/mysqld script OLD default values: STARTTIMEOUT=120 STOPTIMEOUT=60 NEW values: STARTTIMEOUT=240 STOPTIMEOUT=240 Now lets try stopping the MySQL instance again: [root@mwlab01-mysql01~]# service mysqld […]

Setup SSH key using RSA and configure passwordless SSH

The SSH protocol provides security between 2 systems. Use of the SSH protocol handles different methods of authentication. In todays example we will cover the SSH public key based authentication. This method will allow SSH access via a public key without a password(passwordless ssh). This can be further secured with a passphrase, however it is […]