How to find Release version of different Unix OS

RedHat Linux

# cat /etc/redhat-release

Red Hat Enterprise Linux ES release 4 ( Nahant Update 8 )

SUSE Linux

# cat /etc/SuSE-release

SUSE Linux Enterprise Desktop 10 (x86_64)

VERSION = 10

Sun Solaris

# cat /etc/release

Solaris 10 6/06 s10s_u2wos_09a SPARC
Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 09 June 2006

Ubuntu Linux

# cat /etc/issue

Ubuntu 6.10 n l

HP UX

# uname -r
B.11.23

AIX

# oslevel
5.3.0.0

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Exploring Node.js Internals

I found a great article explaining Node JS internals, must read : https://www.smashingmagazine.com/2020/04/nodejs-internals/ Some other articles : Introduction to Node.js Being an official website, Node.dev explains what Node.js is, as well as its package managers, and lists web frameworks built on top of it. “ JavaScript & Node.js ”, The Node Beginner Book This book by Manuel Kiessling does a fantastic job of explaining Node.js, after warning that JavaScript in the browser is not the same as the one in Node.js, even though both are written in the same language. Beginning Node.js This beginner book goes beyond an explanation of the runtime. It teaches about packages and streams and creating a web server with the Express framework. LibUV This is the official documentation of the supporting C++ code of the Node.js runtime. V8 This is the official documentation of the JavaScript engine that makes it possible to write Node.js with JavaScript.

glibc detected : double free or corruption (fasttop)

While running a code after building it using glibc, if you get this error : glibc detected : double free or corruption (fasttop) To fix this error export " MALLOC_CHECK_" environment variable : export MALLOC_CHECK_=0 Then, try running the program. It worked in my case.

Hibernate Object Conversations

Session methods to use for object conversations Save() A new instance being attached to the session. An insert will be scheduled. Update() Call Update to make a transient object persistent again. It will force a SQL update on the transient object. This is because Hibernate does not know whether the object is dirty or not and to be safe by default schedules an update. This method will throw an exception, if the entity is already registered with the session. - NonUniqueObjectException is thrown. saveOrUpdate() Either a save or an update will be called based on whether the identifier exists or not. No identifier - save is called, else update is called. Or for a better understanding, if the object is transient, then a save is called, if the object is persistent, then an update is called. Reattaching an unmodified instance - If you know for sure that an object is not modified and you just want to make it persistent again - Session.lock(item, LockMode.No

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