- What to do after sudo chmod -x chmod
- How does awk work and what can you do with it
- How to defend against DDOS attacks
- What happens exactly when you type ls -la and press enter in bash?
- Explain every field in top output
- Can virtual memory be larger than physical and why virtual memory is necessary?
- How does user space communicate with kernel space and vice versa.
- What are software interrupts and hardware interrupts what are their functions and differences
- What size should you set when making an lvm snapshot
- What different types of Raid arrays are you familiar with
- Explain the output of ip routes what each entry means and who made them.
- In what layer of OSI model does ICMP protocol work, what is its default port, if it exists
- In what layer of OSI model does ssh work, and what is its default port.
- What has greater priority nice 0 or 19? Explain niceness concept and how is it used?
- How to configure nginx to ballance with requests from the same ip to always go to the same servers?
- What are cgroups and namespaces how are they used for containerisation. How can they also be used?
- What signals in a posix compliant system do you now, explain some of them. What signals can'not be handled and why?
- What are inodes?
- Where is the name of the file stored?
- How to stop a process and save its files marked deleted?(https://unix.stackexchange.com/questions/68523/find-and-remove-large-files-that-are-open-but-have-been-deleted)
- Where are access bits of a file stored?
- Running appache in thread mode vs proccess mode.
- Thread vs process vs corutine/gorutine/korutine