Linux

Opsview CLI tool (API wrapper) 6

by • Linux • Tags: ,

Recently, I was tasked with automating various tasks within Opsview (for those of you not familiar with Opsview, it is a Nagios-based enterprise-class monitoring system).  Unfortunately, I found the web interface was not well suited for the tasks at hand, and the current CLI tools that ship with Opsview are very obscure and difficult to […]

AWS Announces VM import for Linux 0

by • Amazon Web Services, Linux • Tags: , ,

If you are a user of Amazon Web Services, you might be very grateful to see their latest announcement…  You can now import Linux VMs from your own environment into EC2.  This will open up more possibilities when it comes to implementing a true “lift & shift” initiative. AWS has had this capability for a […]

Installing VMware Tools from VMware’s Repository 5

by • Linux, VMware • Tags: , , ,

Update (10/03/2013):  It has been brought to my attention that you can also learn more about the details of the open source packages for VMware Tools by reading this PDF.  The PDF talks about how to maintain your tools across kernel upgrades, etc. Surprisingly, not many vSphere administrators I talk to are aware that VMware […]

Quick Bash script for investigating reasons for NTP time drift on Linux VMware guests 0

by • Linux, VMware • Tags: , , ,

I recently received a help desk ticket asking me to investigate the reason why a large number of RedHat VMware guests were not keeping their clocks in sync.  The Linux administrators were very confused, as the NTP service was running on the guests in question. As you may or may not know, VMware has a […]

How to install Graphite on Amazon Linux 7

by • Amazon Web Services, Linux • Tags: , ,

For those of you that are not familiar with Graphite, it is an open source and scalable real-time graphing system.  It is very powerful for the simple fact that you can send any kind of metric its way at a regular interval and it performs all of the ‘magic’ behind the scenes to generate graphs […]

Increasing number of processes allowed to be run by a user on RHEL / CentOS 6 0

by • Linux • Tags: , ,

By default, many of the Linux distributions (including RHEL / CentOS 6) limit the number of processes that a user can spawn.  This is mainly done to prevent fork bombs from bringing down a system inadvertently. On RHEL and CentOS 6, the default is 1024 processes per user.  In some cases, you do need to […]