How to Check the Last Reboot Time on a Server?

There are a couple of ways to determine when the server has been last rebooted in Linux Operating System.

Option 1: Using “who” command.

 

Option 2: Using “uptime” command

 

Option 3: Using “last reboot” command

 

By |February 23rd, 2015|Categories: Operating Systems, UNIX - LINUX|Tags: , , , |0 Comments

Useful Docker Resources

Virtual networking for docker

http://www.forbes.com/sites/benkepes/2014/10/28/pertino-jumps-on-the-networking-for-docker-stage/

Docker 1.3 with improved security

http://www.zdnet.com/docker-1-3-arrives-with-improved-security-7000034810/

http://www.informationweek.com/cloud/infrastructure-as-a-service/gartner-gives-thumbs-up-to-docker-security/d/d-id/1318612

VMWare and Docker

http://www.informationweek.com/cloud/infrastructure-as-a-service/vmware-vms-and-containers-better-together/a/d-id/1306788

CoreOS offers private docker registry

http://www.datacenterknowledge.com/archives/2014/10/31/coreos-stand-alone-docker-container-registry-for-private-deployments/

Mesos

http://www.ebaytechblog.com/2014/05/12/delivering-ebays-ci-solution-with-apache-mesos-part-ii/#.VFcW85iKC70

Micro-services and continuous delivery

http://contino.co.uk/use-docker-continuously-deliver-microservices-part-1/

http://contino.co.uk/use-docker-continuous-delivery-part-2/

By |January 27th, 2015|Categories: Docker, Tools|Tags: , , |0 Comments

Hadoop Interview Questions – Part 6

51. What is Identity Mapper and Identity Reducer in MapReduce?
Ans:
◦ org.apache.hadoop.mapred.lib.IdentityMapper: Implements the identity function, mapping inputs directly to outputs. If MapReduce programmer does not set the Mapper Class using JobConf.setMapperClass then IdentityMapper.class is used as a default value.
◦ org.apache.hadoop.mapred.lib.IdentityReducer: Performs no reduction, writing all input values directly to the output. If MapReduce programmer […]

By |January 10th, 2015|Categories: Hadoop|Tags: , , , |0 Comments

Windows XP || Run Commands

 

Task
Command

Accessibility Controls
access.cpl

Add Hardware Wizard
hdwwiz.cpl

Add/Remove Programs
appwiz.cpl

Administrative Tools
certmgr.msc

Character Map
charmap

Check Disk Utility
chkdsk

Clipboard Viewer
clipbrd

Command Prompt
cmd

Component Services
dcomcnfg

Computer Management
compmgmt.msc

Date and Time Properties
timedate.cpl

DDE Shares
ddeshare

Device Manager
devmgmt.msc

Direct X Control Panel (If Installed)
directx.cpl

Direct X Troubleshooter […]

By |December 29th, 2014|Categories: Operating Systems, Windows|Tags: , , , |0 Comments

Hadoop Interview Questions – Part 5

41. What do you mean by Task Instance?
Ans: Task instances are the actual MapReduce jobs which run on each slave node. The Task Tracker starts a separate JVM processes to do the actual work (called as Task Instance) this is to ensure that process failure does not take down the entire task tracker. Each Task […]

By |December 23rd, 2014|Categories: Hadoop|Tags: , , |0 Comments