Devops , sysops and linux Interview Questions and answers for experienced

In current roles of Devops cloud support we are asked to show our skills in below areas.

· Solid Experience as a /Unix Systems engineer /Administrator

     Know the internals of Unix Kernel /Shell/UI etc..


what is special files in linux

Special files are kernel objects that are represented as files. Over the years, Unix systems have supported a handful of different special files. Linux supports four: block device files, character device files, named pipes, and Unix domain sockets. Special files are a way to let certain abstractions fit into the filesystem, partaking in the everything-is-a-file paradigm. Linux provides a system call to create a special file.

What is named pipes and sockets

Special files are kernel objects that are represented as files. Over the years, Unix systems have supported a handful of different special files. Linux supports four: block device files, character device files, named pipes, and Unix domain sockets. Special files are a way to let certain abstractions fit into the filesystem, partaking in the everything-is-a-file paradigm. Linux provides a system call to create a special file.

3 types of filesystems

physical,virtual,network

what is page size

page size is the smallest unit addressable by the memory management unit, a hardware component.

what is process

Processes are object code in execution: active, alive, running programs. But they're more than just object code—processes consist of data, resources, state, and a virtualized computer.


 DNS, DHCP, TCP/UDP, IP addressing.

· Troubleshooting skills at many levels of complexity.

whats nobody:nobody in filesystem


· Virtualization and/or cloud computing experience.

· Good understanding of security best practices.


· Impeccable communication skills to successfully engage with customers.