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November 14, 2017 16:01
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| Linux Interview Questions | |
| Tech Level 1 | |
| * One or more ways to add a user to a group. | |
| * Reconfigure hostname | |
| * Determine networking information | |
| * Create a virtual interface? | |
| * Define new resolver | |
| * Outgoing mail relay | |
| * Determine operating system version | |
| * How do you get the network path from here to there? | |
| * What service listens on udp/53? | |
| Tech Level 2 | |
| * Bonding configuration | |
| * VLAN configuration | |
| * Static routes | |
| * In scripting language, how to get the value of the third command line argument | |
| * In scripting language, determine if a variable is not a null value | |
| * LVM resize volume | |
| * Custom binary needs to know about a custom built library shared object. How to make it "visible?" | |
| * Determine if a daemon is listening on a port? | |
| * Disk reports full despite showing free space. What has happened and how could it be avoided? | |
| * Linux shows I have 500k ram free! Why is this not an emergency? | |
| * RPM refuses to install because it says it's already installed, but I know it isn't. | |
| * What is the standard port for an Oracle Listener process? | |
| * What is the standard port for MySQL to listen on? | |
| * What service(s) must be running for NFS filesystems to function? | |
| * If I wanted to give specific access to certain machines for certain services, what files would I look at? | |
| * How to disable SELinux? | |
| * How to disable IPTables? | |
| * Describe the Linux boot sequence, from power button to login prompt. Explain what happens at each step. | |
| Tech Level 3 | |
| * Identify the objects that have been mapped into memory by a running binary | |
| * Identify what a hung or out of control process is doing | |
| * Identify what vlans/traffic an interface can see | |
| * Recommended kernel tuning for high performance web servers | |
| * Change IO elevator schedulers | |
| * Kickstart recipe section that allows custom scripts to be run after the installer finishes | |
| * NUMA cell identification | |
| * Identify the command line arguments a process was started with when it does not show in the process list | |
| * X86 processors: why is node interleaving good? why is it bad? | |
| * How to break into a mysql database when you've lost the login credentials? | |
| * How do you disable certain hardware functions of a network card? | |
| * For a headless server, how do you get console output? | |
| * What has to run for active/active or active/passive links to work properly? |
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Container Questions
Tech level 1
Tech level 2
Tech level 3