- 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 konfu 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 does CTRL-d do?
- What does CTRL-z 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
ls? - What is a Linux kernel module?
- Walk me through the steps in booting into single user mode to troubleshoot a problem.
- Walk me through the steps you’d take to troubleshoot a 404 error on a web application you administer.
- What is ICMP protocol? Why do you need to use?
I’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow , and SEO strategies at Wizbrand.
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