📌 TCP/IP & Troubleshooting 1) What is the TCP 3-way handshake? Ans:-The TCP 3-way handshake is the process used to establish a reliable connection between a client and a server [ … ]
Interview questions phase 2
1) How do you fix a corrupted file system using fsck? Ans:- To fix a corrupted filesystem, unmount it first(umount /dev/sda1), then run fsck -y /dev/sdXN to check and repair [ … ]
Interview questions Phase 1
1. A user complains they cannot log in. How will you troubleshoot? A) I will first check if the user account exists and is not locked ( passwd -S username [ … ]
Networking
1. What is the OSI Model? Explain each layer.A) The OSI (Open Systems Interconnection),The OSI model has 7 layers: Physical (bits), Data Link (frames), Network (routing), Transport (TCP/UDP), Session (connection [ … ]
Nagios
1. What is Nagios? A) Nagios is an open-source monitoring tool used to monitor servers, network devices, applications, and services. It alerts administrators about system issues before they become critical. [ … ]
Soft Link and Hard Link
1. What is a hard link in Linux? A) A hard link is a directory entry that directly points to the inode of a file. Multiple hard links can exist [ … ]
Fdisk
1. What is fdisk in Linux? A) fdisk is a command-line utility used to create, delete, view, and manage disk partitions on Linux systems. 2. How do you list all [ … ]
LVM (Logical Volume Manager)
1. What is LVM in Linux? A) LVM (Logical Volume Manager) is a disk management system in Linux that allows flexible disk storage by creating logical volumes on top of [ … ]
RAID
1. What is RAID? A) RAID (Redundant Array of Independent/Inexpensive Disks) is a technology that combines multiple physical disks into a single logical unit for improved performance, redundancy, or both. [ … ]
DHCP Server
1. What is DHCP? A) DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses, subnet masks, gateways, and DNS servers to clients on a network. 2. What ports does DHCP [ … ]