With 12 years of Linux Administration and Azure Cloud experience, you are unlikely to be asked basic Linux commands. Most interviewers will assume you know them. Instead, they will focus on:
- Real-world production troubleshooting
- Architecture and design
- High Availability and Disaster Recovery
- Azure Linux infrastructure
- Performance tuning
- Automation
- Scenario-based questions
- Leadership and customer handling
Based on our previous conversations, you've worked with RHEL, SUSE, Ubuntu, Azure VMs, Pacemaker clusters, SAP workloads, Azure Backup, ASR, iDRAC/iLO, VMware, so your preparation should emphasize those strengths rather than starting from scratch.
8-Week Interview Preparation Roadmap
Week 1 – Linux Core Administration (Very Important)
Revise these thoroughly.
Linux Boot Process
- BIOS vs UEFI
- GRUB2
- Kernel loading
- initramfs
- systemd boot sequence
- Rescue Mode
- Emergency Mode
- Single User Mode
Interview questions
- Explain Linux boot process.
- Difference between rescue and emergency mode.
- What happens if /etc/fstab is corrupted?
- How to recover root password?
Systemd
Commands
systemctl journalctl systemctl isolate systemctl rescue
Understand
- Targets
- Services
- Dependencies
- Unit files
- Timers
File Systems
Know
- ext4
- XFS
- Btrfs
- NFS
- CIFS
Questions
- Why XFS in RHEL8?
- Difference between ext4 and XFS?
- Can XFS be shrunk?
LVM
Must know
- PV
- VG
- LV
- Snapshot
- Extend
- Reduce
- Striping
Scenario
"Disk became full in production."
How do you extend?
User Management
- sudo
- PAM
- ACL
- SELinux
- umask
Week 2 – Linux Troubleshooting
Most companies ask troubleshooting.
CPU High
Commands
top htop vmstat sar pidstat ps
Memory
Commands
free -h vmstat smem sar
Understand
- Cache
- Buffers
- Swap
- OOM Killer
Disk
Commands
iostat iotop df du lsof
Network
Commands
ip ss netstat tcpdump mtr tracepath dig host
Interview
VM is unreachable.
How do you troubleshoot?
Logs
journalctl dmesg messages secure audit.log
Week 3 – Networking
Very important.
Topics
TCP/IP
Subnetting
DNS
DHCP
Routing
Bonding
NIC Teaming
MTU
Firewall
iptables
nftables
firewalld
SSH
NTP/Chrony
Questions
Difference
TCP vs UDP
NAT
Three-way handshake
DNS resolution
Week 4 – Azure Linux
This is where many candidates struggle.
Know every Azure service used by Linux Admins.
Azure VM
Creation
Disks
Extensions
Resize
Redeploy
Reapply
Availability Set
Availability Zone
VMSS
Proximity Placement Group
Dedicated Host
Storage
Managed Disk
Snapshots
Azure Backup
Restore Point
Azure Files
Azure NetApp Files
Blob
Disk Encryption
Ultra Disk
Premium SSD
Networking
VNET
Subnet
NSG
ASG
Load Balancer
Application Gateway
Private Endpoint
Private DNS
Azure Firewall
Route Table
VPN Gateway
ExpressRoute
Identity
Managed Identity
Service Principal
RBAC
Entra ID
Key Vault
Monitoring
Azure Monitor
Log Analytics
VM Insights
Alerts
Diagnostics
AMA Agent
Week 5 – High Availability
Since you've supported clusters, this should be one of your strongest areas.
Topics
Pacemaker
Corosync
STONITH
Fence Agents
Quorum
Split Brain
SAP Cluster
Azure Shared Disk
Availability Sets
Availability Zones
ASR
Load Balancer
Typical questions
Node down
Quorum lost
Resource failed
VIP not moving
Week 6 – Performance
Know every tool.
top vmstat sar iostat iotop pidstat perf strace lsof ss tcpdump
Questions
Server slow
Application slow
CPU 100%
Memory leak
Disk latency
Week 7 – Automation
Must know
Bash
awk
sed
grep
find
cron
systemd timers
Python basics
Azure CLI
PowerShell basics
Terraform basics
Ansible basics
Git basics
Even if you're not an automation expert, understanding the fundamentals is increasingly expected.
Week 8 – Scenario-Based Questions
Prepare stories around:
- Production outage
- Kernel panic
- Filesystem corruption
- Disk full
- VM not booting
- SSH inaccessible
- SAP HANA issue
- Cluster failover
- Azure VM crash
- Backup restore
- Performance issue
- Security incident
- Customer escalation
Answer using a structured approach:
- Problem
- Analysis
- Troubleshooting steps
- Root cause
- Resolution
- Preventive actions
Azure Topics to Master
- VM deployment
- Azure Backup
- Azure Site Recovery
- Managed Disks
- Disk Encryption
- VM Extensions
- Azure Files
- Azure NetApp Files
- Azure Monitor
- Azure Policy
- Resource Locks
- Tags
- Availability Sets
- Availability Zones
- Virtual Machine Scale Sets
- Managed Identity
- RBAC
- Key Vault
- VNet Peering
- Private Link
- Load Balancer
- Application Gateway
- Bastion
- VPN Gateway
- ExpressRoute
Linux Topics to Master
- Boot Process
- Kernel
- systemd
- LVM
- RAID
- NFS
- Samba
- DNS
- SSH
- SELinux
- Firewalld
- ACL
- PAM
- User Management
- Performance
- Kernel tuning
- Crash analysis
- Package management (RPM, YUM, DNF, Zypper, APT)
- Logs
- Networking
- Storage
- Process management
Interview Preparation Strategy
Since you're targeting senior Linux/Azure roles, I recommend this daily routine:
- 1 hour: Linux concepts and architecture
- 1 hour: Azure services and hands-on labs
- 1 hour: Troubleshooting scenarios and root cause analysis
- 30 minutes: Bash scripting or automation
- 30 minutes: Mock interview questions (explain answers aloud as if speaking to an interviewer)
Speaking your answers is important—it helps you organize complex troubleshooting stories and improves confidence during technical interviews.
I can also help you with a complete interview program
Given your experience, I can create a 30-day Senior Linux + Azure Interview Bootcamp that includes:
- 500+ interview questions with detailed answers
- Daily hands-on lab exercises
- Real production troubleshooting scenarios
- Azure interview questions from Microsoft, Accenture, TCS, Infosys, Wipro, Cognizant, HCL, and Capgemini
- Resume-based mock interview questions tailored to your background
- HR and managerial interview preparation
- Bash scripting and Azure CLI practice
- Final mock interviews with feedback
This would simulate the preparation expected for a senior Linux/Azure engineer with 10–15 years of experience.
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