LazySystemAdmin Blog: “Interview Questions and Answers - Linux Administrator - 2” plus 7 more Articles

[LazySystemAdmin]

LazySystemAdmin Blog: “Interview Questions and Answers - Linux Administrator - 2” plus 7 more Articles

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• Interview Questions and Answers - Linux Administrator - 2
• Features Comparison: Ext3 vs Ext4
• Managing Emulex HBA with hbacmd
• Getting Information about Hard disk : Linux HOWTO
• See other users SSH sessions in Linux
• Limit SSH Access for Users
• Understanding TOP command ouput in Linux
• Extend SAN disk under Linux LVM

Interview Questions and Answers - Linux Administrator - 2 Posted: 20 Jul 2011 02:48 AM PDT What command can you use to review boot messages? The dmesg command can be used to display the system messages during boot time. What are the fields in the /etc/passwd file. Explain them? There are 7 fields in... Read More at http://lazysystemadmin.blogspot.com

Features Comparison: Ext3 vs Ext4 Posted: 20 Jul 2011 02:13 AM PDT . Here is the quick facts and comparison of Ext3 and Ext4 File systems:  Hope this helps..! Features Ext3 Ext4 Stands For Ext3 stands for third extended file system. Ext4 stands for fourth extended file system. ... Read More at http://lazysystemadmin.blogspot.com

Managing Emulex HBA with hbacmd Posted: 20 Jul 2011 12:50 AM PDT The Emulex hbacmd utility can be used to print lot of configuration and performance attributes and can be used to manage the HBA operations.  To view performance metrics of HBA: To view all available performance metrics, the hbacmd utility can... Read More at http://lazysystemadmin.blogspot.com

Getting Information about Hard disk : Linux HOWTO Posted: 19 Jul 2011 12:19 PM PDT Getting Information about the Hard drive in Linux: # hdparm /dev/sda /dev/sda: multcount    = 16 (on) IO_support   =  0 (default 16-bit) unmaskirq    =  0 (off) using_dma    =  1 (on) keepsettings =  0 (off) readonly     =  0 (off) readahead    =... Read More at http://lazysystemadmin.blogspot.com

See other users SSH sessions in Linux Posted: 19 Jul 2011 05:55 AM PDT Are wondering what your users are doing in their SSH sessions? Do you want to see, whats happening there? Try the following: # cat /dev/vcs1 This will show you what happenening on the first console. If someone is typing, you’ll be able to get... Read More at http://lazysystemadmin.blogspot.com

Limit SSH Access for Users Posted: 19 Jul 2011 05:40 AM PDT How do you limit the access to the SSH for different users in Linux server? We can use “Match” in the OpenSSH configuration file. Add the Match directive in your sshd_config followed by a criteria which you want to block (User, Group, Address or... Read More at http://lazysystemadmin.blogspot.com

Understanding TOP command ouput in Linux Posted: 19 Jul 2011 05:45 AM PDT How do I determine CPU and Memory utilization, based on running processes in Linux using TOP? Top command provides a real-time look at what is happening with your system. Top produces so much output that a new user may get over whelmed with all... Read More at http://lazysystemadmin.blogspot.com

Extend SAN disk under Linux LVM Posted: 19 Jul 2011 05:44 AM PDT In Linux server, How to extend the SAN disk under LVM , after the LUN expanded from SAN?  This article will explain you, how to do this. we are going to expand size of the SAN disk which is 20GB to 75GB under LVM. Basically, Linux detects the new... Read More at http://lazysystemadmin.blogspot.com

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