Month: August 2019

How to identify /dev/mapper/path actual device on our linux system ?

Today in this post, we will look how to identify the lvm, or multipath device which is mapped by device mapper on our system. Device mapper automatically creates a pseudo...

By Saket Jain Published August 24, 2019 Linux/Unix
How to compare timestamp of a logfile and generate error in case its 72 hours old ?

Here in this article, we will look at a script created to check a logfile and if its older than 3 days i.e. 72 hours then send an email to...

By Saket Jain Published August 6, 2019 Linux/Unix, Shell Scripting
What is entropy pool in linux and how to generate and see the entropy pool data ?

I. Introduction Entropy pool is a large number (typically around 4096 bits) stored in a memory location which can be read by programs. This large number is a random number...

By Saket Jain Published August 4, 2019 Linux/Unix

Vishu on How to create full size one partition using parted command in Linux ?: “Thanks a lot. This was exactly what I was looking for. Other blogs are very confusing but this worked for…” Jul 30, 23:26
cccc on Print only usernames from /etc/passwd file using grep, awk or cut commands.: “love it” Oct 18, 16:13
Saket Jain on How to configure and install Nagios Server on Linux ?: “Please check your system resolv.conf/DNS settings, it looks its not able to resolve the hostname. The URL is correct.” Jul 18, 13:37
deepanshu on How to configure and install Nagios Server on Linux ?: “[root@localhost nagios]# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.4.5.tar.gz –2023-07-02 19:15:08– https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.4.5.tar.gz Resolving assets.nagios.com (assets.nagios.com)… failed: Name or service not known. wget: unable to resolve host…” Jul 3, 08:13
aasdasdKEKEK on Solved: subscription-manager – Not supported by a valid subscription.: “You Genius. How do we “verify if we have enough subscription available on redhat support to add this new server.”” May 27, 18:26

Saket Jain is a GNU/Linux sysadmin from Alwar, Rajasthan, India. He works for a worldwide leading consumer product company and takes great pleasure on working with Linux Internals alongwith using FOSS tools to increase productivity in all areas of his daily work.

Achievements
1. He derived NGEL from Centos.
2. Created delete, undelete and deleteperm command.
3. Has more than 8 Years of experience in Linux/Unix System administration and consultation.
4. Certified Yoga Trainer under Govt. of India.
5. Limca Book of Record Certificate Holder in 2012
6. Author of the book "Unix Administration Quick Guide"
7. ITIL 2011 Foundation Certified, and RHCE Certified under RHEL5,6, and 7.
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