Application

You are applying for the position of SYSTEM ADMINISTRATOR II (Linux Servers).
If you do not know an answer to a question, leave it blank

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Name

Your full name

Question 1

What is your preferred Linux distribution, and why?

Question 2

You have 1 dns server, all the zones are set up and you were able to test you zones. you are ready to change the nameserver at the registrar. What is missing?

Question 3

You configure an email server for a new domain but all the email you send goes into recipients spam folder, what should you do to help avoid that?

Question 4

Describe what you can do with Cacti and how you would proceed to graph a custom metrics on a remote system.

Question 5

How do you delete 600 GBs of small files?

Question 6

You are using the PHP package provided by your distribution but a feature is missing and you can't find that feature in the distribution repository. What do you do ?

Question 7

You were given an application and you need to deploy it on each of your servers, how would you do that?

Question 8

Explain the particularity of each of those raid levels : raid0, raid1, raid5, raid10. Give an example of common use for each of these setups.

Question 9

On a server with 16 GB memory, how big would you set the innodb_buffer_pool_size, considering that the server is dedicated to this database.

Question 10

On a server running only mysql with myisam tables and having 8 GB of memory, what is the maximum value of max_connections you could set if the key_buffer_size is 2G and every other settings are default.

Question 11

How do you fix replication on mysql 5.1?

Question 12

You have a mysql server and a particular query always stay at "writing to net" status, what could be the cause?

Question 13

please describe what you see and how you could enhance performance only by looking at this top header

top - 16:22:18 up 290 days, 21:55, 2 users, load average: 4.19, 3.96, 3.91
Tasks: 207 total, 1 running, 206 sleeping, 0 stopped, 0 zombie
Cpu(s): 22.2%us, 4.5%sy, 0.0%ni, 46.9%id, 21.2%wa, 0.4%hi, 4.8%si, 0.0%st
Mem: 8310904k total, 8263580k used, 47324k free, 559116k buffers
Swap: 16779884k total, 510756k used, 16269128k free, 4485680k cached

Question 14

What would you use to monitor local remote services using nagios, summarize all the step you would do for that configuration.

Question 15

What are your favorite tools to measure server performance.

Question 16

What DNS records are the most important for an email setup for a particular domain? Please explain significance of SPF records

Question 17

How could you protect your site from a DDOS attack?

Question 18

Someone is flooding your website with the same type of request, how could you automatically block its IP?

Question 19

Please write a script that would give the mean and total of the 3rd columns in the following csv file:

something,somewhere,this_one
29,34,23
23,33,13
654,1,23
1,0,0
73,34,0
134,34,0

Question 20

Your server is running out of free space. Please describe methods/commands you would use to map out remaining free space and space taken by files and find the largest files occupying the drives

Question 21

Are you familiar with cloud hosting (Amazon EC2) environment? How does ELB work and what is required to make sessions persist to underlying machines?

CV/Resume

Please attach your CV/Resume. Must be Document or PDF file, maximum 2MB in size. English only!