Category Archives: Linux Administrator Interview Questions

RedHat linux system administration Interview questions and answers pdf

Latest RedHat linux system administration Interview questions and answers, Most Frequently asked RedHat linux system administration objective type questions and answers RedHat linux system administration Multiple Choice Questions List 1. John works as a Network Administrator for Perfect Solutions Inc. The company … Continue reading

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What is load average in a linux ? | Linux Administration Questions

Load Average is defined as the average sum of the number of process waiting in the run queue and number of process currently executing over the period of 1,5 and 15 minutes. Using the ‘top’ and ‘uptime’ command we find … Continue reading

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How to find all the regular files in a directory? | Linux Administration Questions

using the command ‘find /

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At which location Puppet Master Stores Certificates? | Linux Administration Questions

/var/lib/puppet/ssl/ca/signed

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What is the difference between Active and Passive FTP sessions: | Linux Administration Questions

Active FTP : command channel : client port above1023 connects to server port 21 data channel: client port above 1023 is connected from server port 20 Passive FTP : command channel: client port above 1023 connects to server port 21 … Continue reading

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How do you list all kernel modules that are compiled in or enabled? | Linux Administration Questions

You can execute: cat /boot/config-$(uname -r)

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What is system load averag as displayed by uptime? | Linux Administration Questions

Load Average is the sum of the number of processes waiting in the run-queue plus the number currently executing.If there are four CPUs on a machine and the reported one-minute load average is 4.00, the machine has been utilizing its … Continue reading

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What is Memory Overcommit in Linux? | Linux Administration Questions

By default, Linux will allow processes to allocate more virtual memory than the system actually has, assuming that they won’t end up actually using it. When there’s more overcommited memory than the available physical and swap memory the OOM-killer picks … Continue reading

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What Linux utility can craft custom packets, like TCP SYN packets and send them to a remote host? | Linux Administration Questions

hping3 -S 192.168.1.1 -p 80 -i u1

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What command can you use to send unsolicited ARP updates to the neighboring servers’ caches. | Linux Administration Questions

arping -U -c 1 -I eth0 0.0.0.0 -s IP_ADDRESS

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