SysAdm Job Interview Questions Mid Level pt2

Описание: Part 2 Medium Questions for Sys Admin
What are “important” files?
What is the difference between messages and boot.log?
What can dmesg show you?
What is a hard link?
What is an inode? (files, dir)
How do you change kernel parameters without rebooting the machine?
What can you find in the /proc directory?
Why would you want to run a command as another user?
Why is a non-standard shell helpful to a sysadmin?