I mostly apply to devops / sysops / sys engineer / release engineer / automatization engineer jobs.
Here you can find my up to date cv
-
Difference between apache and nginx?
https://www.digitalocean.com/community/tutorials/apache-vs-nginx-practical-considerations
-
If you wanted to find the procedures that a Linux program executes, what tool could you use?
-
From the shell, what built-in function would you use to replace the current process with its argument(s)?
-
What file would you edit if you wanted to change the ordering of which name systems are consulted?
-
What are the three types of messages issued while establishing a TCP connection?
http://www.tcpipguide.com/free/t_TCPConnectionEstablishmentProcessTheThreeWayHandsh-3.htm
-
In a reverse HTTP proxy, to which header is customary to add the remote IP address in the new request?
-
Which Elasticsearch API would you call to get the JVM versions of all running nodes?
https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-nodes-info.html
-
Describe how PXE works
-
Talk aobut TFTP
https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol
-
How would you change the
resolv.confon 20 machines in the same time?for HOST in $(cat servers.txt ) ; do ssh $HOST "echo nameserver 1.1.1.1 > /etc/resolv.conf" ; done -
How would you do this on thousands faster?
for HOST in $(cat servers.txt ) ; do ssh $HOST "echo nameserver 1.1.1.1 > /etc/resolv.conf" & ; donehttp://unix.stackexchange.com/a/103734 -
What tool would you use to change the existing line in
resolv.conf? -
You have 10 webservers how would you tell the top10 ip addresses from their access log
For ten servers you can use the
forloop above with this command:awk '{ print $1 }' access.log | sort | uniq -c | sort -nr | head -10 -
How would you do that on thousands of servers
Here you can talk about centralized log collection or event based logging http://www.rsyslog.com/ https://www.elastic.co/webinars/introduction-elk-stack
-
Talk about the major RAID types
http://www.tonypickett.com/wp-content/uploads/2013/12/allraid.png
-
What is a zombie process?
-
What is an ephemeral port?
-
What limits the maximum number of connections on a linux server?
-
How netstat works?
-
How traceroute works?
https://ccieblog.co.uk/basic-troubleshooting-commands/how-does-traceroute-work
-
What process has PID 0 and PID 1?
-
What is
/proc? -
What is the difference between ext2 ext3 and ext4 filesystems?
-
Why is a battery on a RAID controller?
-
How would you fix
chmod a-x -Rf /bin?http://unix.stackexchange.com/questions/83862/how-to-chmod-without-usr-bin-chmod