In Fedora, ramdisks are not created by default as is the case with RHEL. So, if you need to get Ramdisks on Fedora, then you can do this:
sudo yum install MAKEDEV
This will create some default Ramdisk’s in the “/dev” directory. Now, if you need to change anything then feel free to go to “/etc/makedev.d” and feel free to change these files.
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by Ramesh Natarajan on March 29, 2011
Using sar you can monitor performance of various Linux subsystems (CPU, Memory, I/O..) in real time.
Using sar, you can also collect all performance data on an on-going basis, store them, and do historical analysis to identify bottlenecks.
Sar is part of the sysstat package.
This article explains how to install and configure sysstat package (which contains sar utility) and explains how to monitor the following Linux performance statistics using sar.
Continue readingHere is description of program/utility to display the currently logged in user in a Linux box (tried on Fedora 13 Goddard):
Whowatch is an interactive console utility that displays informations about the users currently logged on to the machine, in real time. Besides standard information (login, tty, host, user’s process) you can see type of login (ie. ssh, telnet). You can also see selected user’s processes tree or all system processes tree. In the process tree mode there is ability to send INT or KILL signal to selected process.
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Rounding out the fall releases from the big cheeses in Linux comes <a class="zem_slink freebase/en/fedora" title="Fedora" rel="homepage" href="http://fedoraproject.org/">Fedora 12. <a href="http://fedoraproject.org/">Fedora is a popular <a class="zem_slink freebase/en/linux_distribution" title="Linux distribution" rel="wikipedia" href="http://en.wikipedia.org/wiki/Linux_distribution">Linux distribution funded by <a href="http://www.redhat.com/">Red Hat, the most profitable Linux <a class="zem_slink freebase/guid/9202a8c04000641f8000000006ae3af5" title="Company" rel="wikipedia" href="http://en.wikipedia.org/wiki/Company">corporation active today. Fedora usually sits within the top three or four most popular distributions at <a href="http://distrowatch.com">distrowatch.com.
Much of the company and community work that goes into Fedora will find its way into <a href="http://www.redhat.com/rhel/">Red Hat Enterprise Linux, the commercial Linux version used by governments and <a class="zem_slink freebase/guid/9202a8c04000641f800000000004e02d" title="Business" rel="wikipedia" href="http://en.wikipedia.org/wiki/Business">businesses around the world. You might compare the relationship between Red Hat and Fedora to <a href="http://www.novell.com/linux/">Novell and <a href="http://www.opensuse.org/en/">openSUSE.
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