Intermediate Linux / Unix System Administrator Tutorials

These tutorials assumes that you have strong understanding of Unix like operating systems and very comfortable with most aspects of the Unix/Linux operating system. Familiar with fundamental networking/distributed computing environments is required. ( rss feed )

I am trying to set exec-shield protection on Linux as described here but getting the following error on Ubuntu Linux server version 12.04 LTS:

sysctl -w kernel.exec-shield=1
error: “kernel.exec-shield” is an unknown key

How do I fix this problem and make sure exec-shield buffer overflow protection security feature turned on Ubuntu Linux?

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How do I set an rpm build environment on CentOS / RHEL / Red Hat Enterprise Linux version 6.x? How can I set rpm build environment on latest version of Fedora Linux?

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How do I install and use gcutil – a command-line tool that is used to manage Google Compute Engine resources under Debian or Ubuntu or CentOS/Fedora Linux desktop operating systems?

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How do I mount an ISO image in OpenBSD operating systems using command line options?

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I am a network admin who recently made the switch from MS-Windows to Ubuntu Linux. I need to use Java and Firefox web browser plugin to run java applet. I am unable to access many devices such as Firewall appliance, LBS/VPX, and network equipments due to Ubuntu’s incompatible openjdk and icedtea plugin. I also searched software center but unable to find Oracle Java 7. How do I install Oracle Java 7 and get rid of this incompatibility problems on Ubuntu Linux amd64 v12.04 LTS or v13.04+?

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I have installed Debian or Ubuntu Linux on Dell Inspiron / Latitude / Precision / Vostro laptop. How do I see the current CPU temperature? How do I control and see fan status on Dell laptop?

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I am unable to find Google Chrome Browser in Ubuntu software center. How do I install Google Chrome in Ubuntu version 12.04 LTS or v13.04 using command line options?

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