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I use various tools like Nagios, Zabbix, and Prometheus for effective system monitoring and performance tracking.
Nagios: Provides comprehensive monitoring of systems, networks, and infrastructure.
Zabbix: Offers real-time monitoring and alerting capabilities with a web-based interface.
Prometheus: A powerful time-series database and monitoring system, ideal for dynamic environments.
Grafana: Often used alongside Prom...
Rear (Relax and Recover) is a tool for creating system backups in Unix/Linux environments.
Install Rear: Use package managers like 'apt' or 'yum' to install Rear. Example: 'sudo apt install rear'.
Configure Rear: Edit the configuration file located at '/etc/rear/local.conf' to set backup options.
Run Backup: Execute 'rear mkbackup' to create a backup. This will generate a backup in the specified location.
Verify Backu...
LVM (Logical Volume Manager) allows flexible disk management by creating logical volumes from physical storage devices.
LVM abstracts physical storage into logical volumes, making it easier to manage disk space.
It consists of Physical Volumes (PVs), Volume Groups (VGs), and Logical Volumes (LVs).
PVs are the actual disks or partitions, VGs are pools of storage, and LVs are the usable storage units.
You can resize LVs...
The boot process initializes the system, loading the operating system and preparing the hardware for use.
1. BIOS/UEFI: The process starts with the BIOS or UEFI firmware performing a POST (Power-On Self-Test) to check hardware integrity.
2. Bootloader: After POST, the BIOS/UEFI locates the bootloader (e.g., GRUB) from the bootable device to load the OS.
3. Kernel Loading: The bootloader loads the kernel into memory a...
Swap space is disk space used as virtual memory when RAM is full, enhancing system performance.
Swap space can be a dedicated partition or a file on the filesystem.
To create a swap file: 'sudo fallocate -l 1G /swapfile' creates a 1GB swap file.
Set the correct permissions: 'sudo chmod 600 /swapfile'.
Format the file as swap: 'sudo mkswap /swapfile'.
Activate the swap file: 'sudo swapon /swapfile'.
To make it permanent,...
I appeared for an interview in Jul 2025, where I was asked the following questions.
LVM (Logical Volume Manager) allows flexible disk management by creating logical volumes from physical storage devices.
LVM abstracts physical storage into logical volumes, making it easier to manage disk space.
It consists of Physical Volumes (PVs), Volume Groups (VGs), and Logical Volumes (LVs).
PVs are the actual disks or partitions, VGs are pools of storage, and LVs are the usable storage units.
You can resize LVs dyna...
The boot process initializes the system, loading the operating system and preparing the hardware for use.
1. BIOS/UEFI: The process starts with the BIOS or UEFI firmware performing a POST (Power-On Self-Test) to check hardware integrity.
2. Bootloader: After POST, the BIOS/UEFI locates the bootloader (e.g., GRUB) from the bootable device to load the OS.
3. Kernel Loading: The bootloader loads the kernel into memory and ha...
I use various tools like Nagios, Zabbix, and Prometheus for effective system monitoring and performance tracking.
Nagios: Provides comprehensive monitoring of systems, networks, and infrastructure.
Zabbix: Offers real-time monitoring and alerting capabilities with a web-based interface.
Prometheus: A powerful time-series database and monitoring system, ideal for dynamic environments.
Grafana: Often used alongside Prometheu...
Rear (Relax and Recover) is a tool for creating system backups in Unix/Linux environments.
Install Rear: Use package managers like 'apt' or 'yum' to install Rear. Example: 'sudo apt install rear'.
Configure Rear: Edit the configuration file located at '/etc/rear/local.conf' to set backup options.
Run Backup: Execute 'rear mkbackup' to create a backup. This will generate a backup in the specified location.
Verify Backup: Ch...
Swap space is disk space used as virtual memory when RAM is full, enhancing system performance.
Swap space can be a dedicated partition or a file on the filesystem.
To create a swap file: 'sudo fallocate -l 1G /swapfile' creates a 1GB swap file.
Set the correct permissions: 'sudo chmod 600 /swapfile'.
Format the file as swap: 'sudo mkswap /swapfile'.
Activate the swap file: 'sudo swapon /swapfile'.
To make it permanent, add ...
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I appeared for an interview in May 2021.
I applied via Referral and was interviewed before Jun 2020. There were 3 interview rounds.
I can install software and hardware efficiently, ensuring system compatibility and optimal performance.
Assess system requirements before installation to avoid compatibility issues.
Use package managers like APT or YUM for software installation on Linux systems.
For hardware, ensure proper drivers are installed for optimal functionality.
Conduct post-installation testing to verify that software and hardware are functioning...
I applied via Naukri.com and was interviewed in Mar 2022. There were 3 interview rounds.
AD is Active Directory, a directory service developed by Microsoft. ISO layers refer to the OSI model, and TCP/IP is a protocol suite.
Active Directory is a directory service used to manage resources in a network.
ISO layers refer to the Open Systems Interconnection model, which is a conceptual model used to describe network communication.
TCP/IP is a protocol suite used for communication between devices on a network.
TCP/...
I applied via Naukri.com and was interviewed before Nov 2022. There were 3 interview rounds.
DNS stands for Domain Name System, which translates domain names to IP addresses.
DNS is like a phone book for the internet, translating human-readable domain names (like google.com) to IP addresses (like 172.217.3.206).
It helps users access websites by typing in easy-to-remember domain names instead of complex IP addresses.
DNS servers store records of domain names and their corresponding IP addresses, allowing for effi...
DHCP assigns IP addresses to devices on a network automatically
DHCP server receives a request from a device for an IP address
DHCP server assigns an available IP address to the device
DHCP server also provides other network configuration information like subnet mask and default gateway
DHCP lease time determines how long the IP address is valid for
DHCP uses a client-server model
To troubleshoot browser slowness, check for network issues, clear cache and cookies, disable extensions, update browser, and check for malware.
Check for network issues such as slow internet connection
Clear browser cache and cookies to improve performance
Disable unnecessary browser extensions that may be causing slowness
Update the browser to the latest version for better performance
Scan for malware or viruses that could...
Current CTC is $70,000 and expected CTC is $80,000
Current CTC: $70,000
Expected CTC: $80,000
I applied via LinkedIn and was interviewed in Apr 2022. There was 1 interview round.
I applied via Approached by Company and was interviewed before Sep 2022. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Mar 2021. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Jun 2021. There were 2 interview rounds.
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