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yum is a package manager that resolves dependencies and installs packages from repositories, while rpm is a low-level package manager that installs packages directly.
yum is a high-level package manager that uses rpm as its underlying package management system
yum resolves dependencies automatically and installs packages from configured repositories
rpm is a low-level package manager that installs packages directly, witho...
ls -l is a command used in Linux to list files and directories in long format.
Displays file/directory permissions, owner, group, size, date modified, and name
The first character of the output indicates whether it is a file (-) or directory (d)
Example: ls -l /home/user/Documents
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I applied via Company Website and was interviewed before Apr 2021. There were 2 interview rounds.
Quantitative aptitude and logical aptitude test
There will be 2 code and you need to understand and input missing lines then run it, after successful completion you will be selected for round 3. You need to run at least 1 code successfully.
I applied via Referral and was interviewed before Jul 2021. There was 1 interview round.
I applied via LinkedIn and was interviewed before Oct 2020. There was 1 interview round.
Patching physical servers involves identifying vulnerabilities, testing patches, scheduling downtime, and applying patches.
Identify vulnerabilities through vulnerability scanning or manual review
Test patches in a non-production environment to ensure compatibility and stability
Schedule downtime with stakeholders and communicate the impact of the patching
Apply patches using a patch management tool or manually
Verify the s...
Patching rollback can be done by identifying the patch, uninstalling it, and restoring the previous version.
Identify the patch that caused the issue
Uninstall the patch using the appropriate command
Restore the previous version of the software or package
Test to ensure the issue has been resolved
RHEL7 is the newer version with improved features and security updates.
RHEL7 has better support for Docker and containers
RHEL7 has improved security features like firewalld and SELinux
RHEL7 has updated versions of software packages
RHEL7 has a new default file system, XFS
RHEL7 has improved networking capabilities with NetworkManager
RHEL6 is still widely used and has long-term support until 2024
I applied via Recruitment Consultant and was interviewed in Apr 2021. There was 1 interview round.
LVM (Logical Volume Manager) is a disk management tool used in Linux systems to manage storage devices and create logical volumes.
LVM allows for easy management of storage by abstracting physical storage devices into logical volumes.
It provides features like volume resizing, snapshots, and striping for improved performance and flexibility.
LVM enables dynamic allocation of storage space, making it easier to add or remov...
Patching is the process of applying updates or fixes to software or systems to address vulnerabilities or improve functionality.
Patching involves downloading and installing updates provided by software vendors.
It helps to fix bugs, security vulnerabilities, and improve performance.
Patches can be applied to operating systems, applications, or firmware.
Regular patching is crucial to maintain system integrity and protect ...
LVM (Logical Volume Manager) is configured by creating physical volumes, volume groups, and logical volumes.
Create physical volumes using the 'pvcreate' command
Create volume groups using the 'vgcreate' command
Create logical volumes using the 'lvcreate' command
Format the logical volumes with a file system using the 'mkfs' command
Mount the logical volumes to desired mount points using the 'mount' command
Update the '/etc/
Decommission is the process of retiring a system or service, while recommission is the process of bringing it back into service.
Decommission involves shutting down and removing a system or service from operation.
Recommission involves restoring a decommissioned system or service back into operation.
Decommission and recommission are common processes in IT infrastructure management.
Examples include retiring an old server ...
NFS allows remote access to files and directories, providing centralized storage and easy sharing.
Enables sharing of files and directories across multiple systems
Reduces storage costs by centralizing data on a single server
Improves data availability and reliability through redundancy
Simplifies administration by allowing for centralized management
Examples: Sharing files between a web server and a database server, sharin
A user can be created in a single line command using the 'useradd' command in Linux.
Use the 'useradd' command followed by the username to create a user.
Specify additional options like home directory, shell, etc. if required.
Example: useradd john -m -s /bin/bash
To reset the root password, you can use the single-user mode or a bootable Linux distribution.
Boot into single-user mode by interrupting the boot process and appending 'init=/bin/bash' to the kernel command line.
Remount the root filesystem as read-write using the 'mount -o remount,rw /' command.
Change the root password using the 'passwd' command.
Alternatively, boot from a bootable Linux distribution like a Live CD or U...
Possible causes of user not able to login to an application
Incorrect username or password
Account locked or disabled
Expired password
Network connectivity issues
Application server down
Incorrect permissions or access rights
Firewall blocking access
Authentication server issues
Application configuration errors
To set the password for a newly created user in Linux, use the 'passwd' command followed by the username.
Open the terminal or SSH into the Linux system
Run the 'passwd' command followed by the username of the new user
Enter and confirm the new password when prompted
A cron job is a scheduled task that runs automatically at specific intervals on a Linux system.
Cron jobs are managed by the cron daemon, which reads a configuration file called crontab.
To write a cron job, you need to edit the crontab file using the 'crontab' command.
Each line in the crontab file represents a separate cron job and follows a specific format.
The format consists of five fields: minute, hour, day of month,...
An I node number is a unique identifier assigned to each file in a Unix-like file system.
I node number is also known as index node number.
It contains metadata about the file such as ownership, permissions, timestamps, etc.
It is used by the operating system to locate and access the file on the disk.
The command 'ls -i' can be used to display the I node number of a file.
I applied via Naukri.com and was interviewed in Apr 2024. There was 1 interview round.
I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.
Patching from Satellite using yum update commands involves registering systems with Satellite, creating custom repositories, and running yum update commands.
Register systems with Satellite using subscription-manager command
Create custom repositories in Satellite for specific packages or updates
Run yum update command on systems to apply patches from Satellite
Monitor patching progress and schedule updates as needed
Exampl...
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