administratosphere.wordpress.com
Generating Passwords Using crypt(3) | UNIX Administratosphere
https://administratosphere.wordpress.com/2011/06/16/generating-passwords-using-crypt3
UNIX and Linux System Administration. Generating Passwords Using crypt(3). Asymp; 8 Comments. When writing things like Red Hat Kickstart scripts, or using useradd, or in many other cases, a password is required in the format generated by crypt(3). However, how do we generate a password in this format? In fact, there are many, many ways – if you just know what they are. One way is to use mkpasswd. This utility is made just for this very purpose; to generate a password with crypt(3) use the command:. You c...
administratosphere.wordpress.com
Using Nagios from an Android Phone | UNIX Administratosphere
https://administratosphere.wordpress.com/2011/08/12/using-nagios-from-an-android-phone
UNIX and Linux System Administration. Using Nagios from an Android Phone. Asymp; 6 Comments. I got an Android. Phone in the last year, and started looking in earnest for a Nagios. Client for it. With a Nagios client, you can read what the current status is of your systems in Nagios. There are several available; the two most often mentioned are NagRoid. However, neither one of these worked for me, and there are indeed others that were good. Into serving the main Nagios page via SSL. In the case of the sta...
administratosphere.wordpress.com
The Nagios Ecosystem: Nagios, Shinken, and Icinga | UNIX Administratosphere
https://administratosphere.wordpress.com/2012/06/22/the-nagios-ecosystem-nagios-shinken-and-icinga
UNIX and Linux System Administration. The Nagios Ecosystem: Nagios, Shinken, and Icinga. Asymp; 2 Comments. Has been a standard-bearer for a long time, being developed originally by Ethan Galstad. And included in Debian. For quite some time. In 2007, Ethan created a company. Built around providing enhancements to Nagios called Nagios Enterprises. However, for several years now there have been competitors to the original Nagios. The first to come along was Icinga. The H-Online also had an interview. In su...
administratosphere.wordpress.com
A Return from Hiatus! | UNIX Administratosphere
https://administratosphere.wordpress.com/2014/08/28/a-return-from-hiatus
UNIX and Linux System Administration. A Return from Hiatus! Asymp; Leave a comment. It’s been a long time since I wrote, and a lot has happened. I won’t bore you with the details, though one very big change has happened and will show itself shortly. My life has had its ups and downs, and I feel like I’ve come out the other side now. Most recently, I’ve been working with OpenVPN. And am getting rid of Endian. I love writing, and it’s about time I returned to it. Larr; Previous post. Next post →. Resetting...
administratosphere.wordpress.com
Apt-Cacher on Ubuntu Trusty | UNIX Administratosphere
https://administratosphere.wordpress.com/2014/09/16/apt-cacher-on-ubuntu-trusty
UNIX and Linux System Administration. Apt-Cacher on Ubuntu Trusty. Asymp; Leave a comment. I have been upgrading a data center server from Lucid Lynx to Ubuntu Trusty, and have been working with the new Icinga, Puppet, and other tools. One nice change was switching from apt-proxy. Apt-cacher is a cache for your apt package fetches, and speeds up access to apt repositories by keeping the relevant packages inside your network instead of in the great Internet beyond. Cache dir = /var/cache/apt-cacher. If yo...
administratosphere.wordpress.com
Handling an Internet Bandwidth Hog | UNIX Administratosphere
https://administratosphere.wordpress.com/2014/09/04/handling-an-internet-bandwidth-hog
UNIX and Linux System Administration. Handling an Internet Bandwidth Hog. Asymp; Leave a comment. I noticed that our company internet was very slow – and it wasn’t long before one of the higher-ups also noticed and asked me about it. I went to SpeedTest.net. And ran a test – the speeds measured were a fraction of what we should have been getting. So I went to our pfSense. Firewall and looked at the traffic graphs (in the. Larr; Previous post. Next post →. Leave a Reply Cancel reply. Notify me of new comm...
administratosphere.wordpress.com
Putting Fedora 16 onto a Dell Optiplex 745 | UNIX Administratosphere
https://administratosphere.wordpress.com/2012/04/18/putting-fedora-16-onto-a-dell-optiplex-745
UNIX and Linux System Administration. Putting Fedora 16 onto a Dell Optiplex 745. Asymp; 1 Comment. I purchased a Dell Optiplex 745. Ultra small form factor) from a used equipment sale at the local university. I had hoped that it would be low power as well, but that does not seem to be the case – although a more modern computer is always going to be more efficient (or at least you would think so). Is available at eHow. 8211; which means it runs fast and light. Running a lightweight desktop on a fast ...
administratosphere.wordpress.com
Sparse files – what, why, and how | UNIX Administratosphere
https://administratosphere.wordpress.com/2008/05/23/sparse-files-what-why-and-how
UNIX and Linux System Administration. Sparse files – what, why, and how. Asymp; 16 Comments. Sparse files are basically just like any other file except that blocks that only contain zeros (i.e., nothing) are not actually stored on disk. This means you can have an apparently 16G file – with 16G of “data” – only taking up 1G of space on disk. There are problems with using sparse files. The most egregious would be that any utility that does not recognize or utilize sparse files can replicate the entire ...