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Channel: Linux – Nikolay Matveev
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Nagios CHECK_IFTRAFFIC plugin returns “Return code of 13 is out of bounds”

… at the same time it works perfectly on the server console. Reason: you’ve run it in the console under root and it has created /tmp/check_if* file which cannot be deleted by nagios user Solution:...

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Free TACACS+ Server

Free TACACS+ Server This one seems to be a very nice project. It’s a pity there in nothing similar for Windows… Has anyone heard of a good freeware version for Windows???

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Kali Linux – apt-get repos and getting the distro up to date

Quick how to (if you fail to make repo’s work during initial installation process): edit /etc/apt/sources.list to add repos as follows: ## Regular repositories deb http://http.kali.org/kali kali main...

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ASCII art for MOTD

Awesome website – http://patorjk.com/software/taag (the link opens in new window) No more boring disclaimers on your Cisco and Linux boxes!

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Leap Second 2015

The time you rarely see! :)

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Red Hat Enterprise Linux 7.1 in VirtualBox – quick setup for a PoC

Obviously it’s not a tutorial – neither for VirtualBox nor for Linux – just a quick note on essentials when you need to provision a RHEL instance in VirtualBox without active Red Hat subscription. I...

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PAM module for GeoIP login restrictions

Found a very nice PAM module (can be used with SSH etc) that can provide login restrictions based on user geo-location as per official internet registrars’ stats files. It’s probably not as good as its...

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Fixing Armitage in Kali Linux 2.0

Sadly Armitage is failing in the fresh install of Kali 2.0 but fortunately there are always good guys who fix all troubles. Here is the one for this particular issue:...

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CIS RHEL hardening script – fixing non-working Sed expressions (unknown...

I do not know what they were thinking about (and testing!) but the sed regular expressions below did not work on neither of my instances of RHEL (CIS remediation script version 1.4.0): # Set nodev...

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Installing node.js on RHEL 7.1

curl --silent --location https://rpm.nodesource.com/setup_4.x | bash - yum install -y nodejs (all this fuss is because there is no “native” yum package for Node.js – apparently they do not like Red Hat...

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