Interview

Question 1

[Interview]
What’s your STIG score?

Answer 1

It’s difficult to say usually just says pass/fail

Ideal score: 0 Cat 1, few Cat 2, few Cat 3

Critical (CAT I) issues must be fixed immediately to maintain security compliance.
Medium (CAT II) and Low (CAT III) issues should be minimized to enhance system security.

Question 2

[Interview]
What tools would you use for monitoring?

Answer 2

$ htop = CPU, memory, swap usage, running processes
$ vmstat 1 = detailed info about sys performance including virtual memory, processes, CPU activity & disk I/O (updated every second)
$ free -h = display memory usage (RAM & swap: total, used, free, shared, cached)

$ df -h = disk space usage for mounted filesystems
$ du -sh [file/dir] = disk usage of [file/dir]

$ “netstat / ss” -tuln = active network connections, listening ports, network stats

Question 3

[Interview]
How do you manage disk storage and clean up disk space?

Answer 3

$ df -h = show free disk space on all mounted filesystems
$ du -sh [file/dir] = shows disk usage of [file/dir]

$ yum clean all = cleans package manager cache
$ yum clean packages = removes package cache

$ logrotate = Rotate (& compress) old logs (located in /etc/logrotate.conf)

$ rm /tmp/* = Delete temp files

need yum-utils:
$ package-cleanup –leaves = removes orphaned packages

Question 4

[Interview]
What is a LAMP environment?

Answer 4

a popular open-source software stack used for hosting web applications utilizing Linux, Apache, MySQL & PHP/Python.

Question 5

[Interview]
Tell me about a time when something broke & you had to fix it

Answer 5

personalized answer

Question 6

[Interview]
What would you do if a server went down?

Answer 6

personalized answer

Question 7

[Interview]
What are some things you would check if your application went down?

Answer 7

personalized answer

Question 8

[Interview]
Someone is complaining of a server with full disk space, & when running a df -h says nothing is full. What would you do?

Answer 8

personalized answer

Question 10

What is your experience with GitLab & BitBucket? (enterprise versions of GitHub)

Answer 10

We use it for version control for CI/CD
(version control: a system that helps manage changes to files, code or documents over time. Also allows you to go back to a previous version of a file, see history of changes or collaborate with others w/o overwriting each others work)