Top 25+ MCSE Interview Questions for System Admins
A collection of 25+ top MCSE interview questions with answers for System Admins.MCSE (Microsoft Certified Solutions Expert) is a senior level certification from Microsoft....
Solaris OK prompt commands
What is OK Prompt?
Most of the time, when you start the server with Solaris OS installed, it boots at run level 2 or run...
The difference between fork(), vfork(), exec() and clone()
Fork:
The fork call basically makes a duplicate of the current process, identical in almost every way (not everything is copied over, for example, resource...
ELK Stack – Upgrade from 2.x to 5.x
Elasticsearch Snapshot and Restore
https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html
Elasticsearch Migration Helper Plugin
cd /usr/share/elasticsearch/
./bin/plugin install https://github.com/elastic/elasticsearch-migration/releases/download/v2.0.4/elasticsearch-migration-2.0.4.zipyou may get updated command from here -> Elasticsearch Migration Plugin InstallYou may download plugin from...
netstat – Find number of active connections in Linux using netstat
The "netstat" command is quite useful for checking connections to your machine. If we wanted to see ALL of the connections (which i really...
Web Server Performance Tuning
First off, Apache, nginx, or LightSpeed aside - if you're running a server with 1000-2000 requests/second it's time to start thinking about dual servers...
top command on multi core processor
top command shows CPU usage as a percentage of a single CPU by default. That's why you can have percentages that are >100. On a...
Windows – How to Kill hung service – Windows Service Which is Stuck
Sometimes as an administrator you may need to kill a service which is stuck in a 'starting' or 'stopping' state, in order to avoid...
Reasons to Stick with MySQL
MySQL’s founder is encouraging people to steer away from his creation. Here’s why he’s wrong.Schism between the worlds of open source and proprietary software...
MySQL Update – MySQL Upgrade
MySQL update process some times create issues like, MySQL server doesn't start.when you perform MySQL update usingyum updateoryum update mysqloryum update mysql-serverbefore restarting or...