Linux Fundamentals

• What did you learn yesterday/this week?
• Talk about your preferred development/administration environment. (OS, Editor, Browsers, Tools etc.)
• Tell me about the last major Linux project you finished.
• Tell me about the biggest mistake you've made in [some recent time period] and how you would do it differently today. What did you learn from this experience?
• Why we must choose you?
• What function does DNS play on a network?
• What is HTTP?
• What is an HTTP proxy and how does it work?
• Describe briefly how HTTPS works.
• What is SMTP? Give the basic scenario of how a mail message is delivered via SMTP.
• What is RAID? What is RAID0, RAID1, RAID5, RAID10?
• What is a level 0 backup? What is an incremental backup?
• Describe the general file system hierarchy of a Linux system.

####[⬆] Simple Linux Questions:

• What is the name and the UID of the administrator user?
• How to list all files, including hidden ones, in a directory?
• What is the Unix/Linux command to remove a directory and its contents?
• Which command will show you free/used memory? Does free memory exist on Linux?
• How to search for the string "my konfi is the best" in files of a directory recursively?
• How to connect to a remote server or what is SSH?
• How to get all environment variables and how can you use them?
• I get "command not found" when I run ifconfig -a. What can be wrong?
• What happens if I type TAB-TAB?
• What command will show the available disk space on the Unix/Linux system?
• What commands do you know that can be used to check DNS records?
• What Unix/Linux commands will alter a files ownership, files permissions?
• What does chmod +x FILENAMEdo?
• What does the permission 0750 on a file mean?
• What does the permission 0750 on a directory mean?
• How to add a new system user without login permissions?
• How to add/remove a group from a user?
• What is a bash alias?
• How do you set the mail address of the root/a user?
• What does CTRL-c do?
• What is in /etc/services?
• How to redirect STDOUT and STDERR in bash? (> /dev/null 2>&1)
• What is the difference between UNIX and Linux.
• What is the difference between Telnet and SSH?
• Explain the three load averages and what do they indicate. What command can be used to view the load averages?
• Can you name a lower-case letter that is not a valid option for GNU