L2 / L3 Linux System Admin Interview Questions
Q: – How to increase the size of KVM IMG file ?
Q: – Explain page in and page out in OS memory management ?
Q: – How to check the perfromance of NFS server in Linux ?
Q: – How to check NFS server's version ?
Q: – What is the main difference between root_sqush and no_root_squash in NFS ?
Q: – What is rpc and its role in nfs ?
Q: – What is use if sar command and location sar log files.
Q: – What is use of vmstat and explain its output & log files?
Q: – What is Network bonding and how to check status of bonding ?
Q: – What are the steps to configure network bonding in linux ?
Q: – Define the role of Luci and Ricci in redhat cluster suite ?
Q: – What is multipathing and why is it required ?
Q: – what is iostat , describe its output and log files ?
Q: – What is the difference of 2.4 and 2.6 kernel ?
Q: – What are difference between ext3 and ext4
Q: – What server need to check first – physical memory is not fully utilized but swap is fully utilized and physical memory is fully utilized but swap memory is free and why ?
Q: – What is chroot env in ftp and how enable chroot for ftp ?
Q: – How to scan luns on the server?
Q: – Difference between raid 3 & raid 5?
Q: – How to execute cron every 5 min from Monday to Friday?
Q: – How to check the machines status in vcs?
Q: – How to extend disk space in vcs?
Q: – Difference between -L & -l in lvcreate command ?
Q: – What activity will run in background if failover of one node occurs ?
Q: – What is "Split Brain" in cluster & is it visible in storage ?
Q: – What is dom0 in Xen ?
Q: – What is POST in Linux Booting Process ?
Q: – What is initrd or ramdisk and use of initrd while booting ?
Q: – What is soft & hard zoning ?
Q: – What is wwpn & wwnn ?
Q: – How Can we check the front & back ports on emc storage server through command line or gui ?
Q: – How can emc server be accessed through CLI ?