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Test Your Understanding about Linux Fundamentals

quize center

 

 

 

This Linux quiz will help the beginners to check their understanding about Linux Basic Administration. And also points to the useful articles that will give you knowledge of real time issues and troubleshooting. 

Resource For Interviews and certification preparation

 

Launch Quiz 

 

Ramdev
7 Comments

RHEL 6 – ISCSI Administration Series – ISCSI Lun resize

This is second post from the ISCSI administration series ( you can refer the first post here RHEL 6 – ISCSI Administration Series – Configuring ISCSI Server and Client ) . In this post, I will be showing you an hands-on exercise to expand a ISCSI LUN which is already configured from the client and actively in use.

 

ISCSI LUN RESIZE

 

Before going for Actual Task,  Just want to show my current configuration both from server side and client side:

  Full Story

Ramdev
3 Comments

RHEL 6 – ISCSI Administration Series – Configuring ISCSI Server and Client

iscsi-title-1 

ISCSI Server Configuration on RHEL 6

 

Overall Steps :

  1.  Install the RPM required for ISCSI Target Administration
  2.  Enable the ISCSI Target Services
  3.  Configure the ISCSI target to share the storage
  4.  Attach Luns to the ISCSI Target
  5.  Share the ISCSI Target to specific Client Machines
  6.  Add CHAP user authentication ISCSI target
  7.  Save the configuration to /etc/tgt/targets.conf , so that configuration won’t last after reboot
  8.  Make rules for IPTABLES to accept iscsi client connection on port 3260

 

 

ISCSI Administration

  Full Story

Ramdev
7 Comments

SAN Storage Migration – Solaris with VxVM

This is a following post for my previous SAN migration post  Solaris host level SAN migration (with SVM) from Clariion to VMAX.   As discussed earlier in my previous post,  many organisations started migrating their Server storage from Old legacy SAN devices ( e.g. EMC Clariion )  to new  powerful SAN storage ( e.g. EMC Symetrix VMAX) because of the low performance and maintenance costs involved with legacy storage.  

                           Depending on the budget allocated for the Storage Migration projects, some organisations  prefer the migration by “direct storage level data replication  using expensive migration tools”,  while the other companies ( who are with limited budget) prefer to do the migrations by host level data replication. In the later method,  the success rate of the migration project directly depends on the skill level and expertise of the  unix administrator who is implementing the migration project.  I believe this hands-on post will give some idea for the Solaris admins whoever responsible for the Storage migrations. Before going to this post you might want to refer this post for the pre-planning tasks. 

Full Story

Ramdev
7 Comments

RHEL 6.3 – LDAP Series – Part 4 : Troubleshooting

 
RHEL 6.3 - LDAP Troubleshooting
 
This is  my fourth post in RHEL 6.3 LDAP implementation Series. And the purpose of this post is to give extra extra muscle to troubleshoot the issues that you encounter during or after the LDAP implementation. In this post i am documenting the troubleshooting tips that i used to solve various questions that I encountered during the LDAP configuration.
 
For successful LDAP encryption configuration, the following command from the client should show the server’s configuration without any errors. 
 
# ldapsearch -x  -b ‘dc=gurkulindia,dc=com’
 
Sometimes, we see that test fails with different errors . And in many cases the command hangs without any error. Troubleshooting at this level is very difficult because we will have no related logs neither at the server nor at the client. This Section I will be explaining the procedure to troubleshoot the connection issues between ldap client and server. 
 
 
 
  Full Story

Ramdev
2 Comments
Tagged with: [ ldap, linux, redhat, rhel6.3 ]

RHEL 6.3 – LDAP Series – Part 3 : LDAP Configuration With Encrypted Communication using TLS/SSL

RHEL 6.3 - LDAP encrypted communication with TLS

 

 

LDAP server authentication without encrypted communication is not recommendable for any organization.  In this Post,  I will be discussing the procedure to configure LDAP server and client to use encrypted authentication and communication. This is third  Post  in LDAP implementation Series.

Previous posts for your reference

 

  •  RHEL 6.3 – LDAP Series – Part 1 : Implementation of LDAP Authentication
  •  RHEL 6.3 – LDAP Series – Part 2 : Configuration of Certification Authority for LDAP encryption.

 

 

 

Before proceeding to actual configuration, I want to explain few details about the procedures to modify the  LDAP configurations.

  Full Story

Ramdev
Comment
Tagged with: [ ldap, linux, redhat, rhel6.3 ]
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  • About Author : My name is Ramkumar Ramadevu ( Ramdev ). I have started writing about enterprise unix system administration since 2009 just for my own knowledge reference, and then later I have made this site available for everyone, for better purpose. ... read more

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  • Recent Comments

    • jack commented :: Do we need to initialize and configure the replaced disk in this proce...
    • Laxxi commented :: Hi Ram, Please guide me how can I provide Read write access to a Fs...
    • Rahul commented :: Hi All, I just want to know . is there any way to implement the sam...
    • Prajwala commented :: Thanks Ramdev...
    • Prajwala commented :: What an Idea Sir ji..... Excellent " Quiz Center "...
    • hari commented :: good xplanation,I understood overview of clustere,can u post some scen...
    • Ramdev commented :: Hi KK, Jsut few questions >> is that oce0:1 having problem with only ...
    • Ramdev commented :: Hi Jeeva, please refer the below page for all LVM related real time st...
    • Ramdev commented :: hi Kishore, i guess your message was truncated ... i did n't get your ...
    • Ramdev commented :: Hi Srinivas, If you have a script called test.sh, which internally ha...
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