Physical Hardware
The official name for an "RJ45" connector. "RJ45" is generally used incorrectly to refer to this.
The name of the configuration that is run every time you start Bash.
What is /etc/profile,
/etc/bash.bashrc,
~/.bashrc,
~/.bash_profile,
~/.bash_login,
~/.profile,
BASH_ENV?
The transport protocol used for peer-to-peer data transmission for torrents.
What is UDP(User Datagram Protocol)?
In Container Linux, the common daemon used to synchronize configuration data.
The utility that lists information about a given user account.
The main physical difference between CAT5E and CAT6.
This directive will correlate a typed in string to be mapped to another command or string.
What is `alias`?
`alias la="ls -lah"`
This service on a network provides a mapping between MAC addresses and IP addresses. Additionally, this protocol can also define default gateways and default routes within the IP space.
What is DHCP (Dynamic Host Configuration Protocol)?
The name of the common disk storage type used by KVM?
The utility that reads from standard input and writes to standard output AND files
What is `tee`?
This type of memory can detect and correct the most common kinds of internal data corruption. It is used in most computers where data corruption cannot be tolerated under any circumstances, such as for scientific or financial computing.
What is Error-correcting code memory (ECC memory)?
*DAILY DOUBLE*
This symbol, when passed into `cd` will change your working directory to the previously visited directory.
What is `-`?
Try `cd -`... after visiting two different directory paths.
In IPTables, the basic chain the packet is transferred to BEFORE a routing decision has been made. Packets usually enter this chain before any other deciding if this packet is addressed to this server.
What is PREROUTING?
In a Dockerfile, this is the directive that defines which image your new docker container will be based-off of.
What is `FROM`?
This tool is used to browse the internet without a Graphical interface.
Server hardware uses special hardware for out-of-band communication and management of a physical server. Often times, it DOES NOT require the server to be powered on, just plugged in.
What is an out-of-band management console?
What is Integrated Lights-Out(iLO) (HP)?
What is Dell Remote Access Controller(DRAC) (Dell)?
This environment variable will store the return code of the previously entered command.
Run `echo $?`.
The subsystem that IPTables communicates with to manage packet routing.
What is netfilter?
A Linux kernel feature that limits, accounts for, and isolates the resource usage (CPU, memory, disk I/O, network, etc.) of a collection of processes.
What are `cgroups`?
The utility will show you the information about the hostname, machine ID, Boot ID, Operating System, Kernel version, and architecture.
This interface allows you to transmit data over a high-speed fiber optic connection. It uses LCLC Duplex cables to send and receive at speeds of 10GB/s or higher.
What is SFP+(enhanced small form-factor pluggable) transceiver?
This keyboard shortcut will move your cursor between the start of the command line and the current cursor position (and back again).
What is `Ctrl + xx`?
This is used to send packets/message to all local clients on the same subnet as you. Generally the data is transmitted over UDP.
What is the `broadcast address`?
This classification of hypervisors are native or bare-metal hypervisors. This requires the hypervisor to be the base layer interacting with the physical hardware.
What is a "Type-1" hypervisor?
This utility will list out current network activity and disk utilization.