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by Ramdev · Published July 1, 2016 · Last modified July 23, 2016
Click here to Subscribe Our Videos on YouTube upcoming DevOPs/Techops Service Workshops: Workshop Page : Devops Series – Puppet automation workshop for unix & linux professionals Fees in USD : Early Bird Fees USD 139 ( Original Fees USD 169) – SBI Payment Gateway Link and...
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by Ramdev · Published September 1, 2015 · Last modified July 23, 2016
Booting Tasks Read – Unexpected Server Reboots of RHEL servers on HP Read – Linux Admin Reference – RedHat Linux Grub Loader Storage Responsibilities Read – Understand Device Mapper and DM-Multipath Read – Identifying Disk Errors in Linux Read – Identify if linux was installed on...
Linux Admin / Linux Performance / Redhat Enterprise Linux 6 / Redhat Linux Kernel / Unix Intermediate
by Ramdev · Published October 4, 2013 · Last modified July 23, 2016
What is Page cache ? When a user process reads or writes a file, it is actually modifying a copy of that file in main memory. The kernel creates that copy from the disk and writes back changes to it when necessary. The memory taken up...
Linux Admin / Linux Performance / Redhat Linux Kernel
by Ramdev · Published December 19, 2011 · Last modified August 6, 2016
Before we discuss about Huge pages, we should revise some of the basic concepts about Operating system memory management. Operating systems basically deals with two types of memory for its operations one is Physical memory ( actual Physical RAM) and the second is Virtual memory ( combination of Physical...
Blog for Unix Admin / Linux Admin / Linux Performance
by Ramdev · Published June 18, 2011 · Last modified July 2, 2015
To modify kernel parameters a common way is to change /proc file system: 1. Log in as root user. 2. Change to the /proc/sys/kernel directory. 3. echo <desired list of values> > <group of parameters> But this update is not permanent and after system reboot, your...
