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--- notes:hpc0 [2019/01/24 19:58] – [Computer Hardware Basics] relliot9
+++ notes:hpc0 [2019/03/27 10:07] – [How to Search/Install/Uninstall in Debian] wedge
@@ Line 34: / Line 34: @@
 . Hard Drive
     * This is where we save data that we do not want to be lost. It has wires called "SATA" wires connected to it for data and power transfer.
-    * It is usually solid and contains disks on which data is kept.
+    * It is usually solid and contains disks on which data is kept.{{ :lair:hard_disk_drive.jpg?nolink&400 |}}
 . RAM (Random Access Memory)
     * Temporary data storage
-    * come in the forms of several smallish sticks. These hold a lot of data, but cannot store things when the power is removed from them.
+    * come in the forms of several smallish sticks. These hold a lot of data, but cannot store things when the power is removed from them.{{ :notes:ram.jpeg?nolink&400 |}}
 . Heat Sinks
     * Look similar to metal "combs" or a series of tall parallel planes. Their purpose is to prevent pieces from overheating, which can warp them and is bad for the computer in general.
-    * These are Passively Cooling, there is also active cooling in the form of fans or water cooled systems.
+    * These are Passively Cooling, there is also active cooling in the form of fans or water cooled systems.{{ :notes:heat_sink.jpg?nolink&400 |}}
 . Motherboard
     * Contains all the essential information on the computer
-    * If you connect the pins in the pwd thing you can bypass security like some kinda hacker.
+    * If you connect the pins in the pwd thing you can bypass security like some kinda hacker.{{ :notes:motherboard.jpg?nolink&400 |}}
+====How to Search/Install/Uninstall in Debian====
+    ***sudo apt-cache search "something"** :: This is useful for finding exactly the program package you want, such as **man-db, manpages, and manpages-dev**. Those will help you immensely with using things you know nothing about!
+    ***sudo apt-get install "something"** :: This is used to install the thing which you want.  It is case sensitive, so make sure to type the exact package you want.
+    ***sudo apt-get update** :: Update everything you've installed, but do not push the updates to the software yet.  Also updates the apt-cache.
+    ***sudo apt-get upgrade** :: Push the update to all software on your system.  Be careful, it may break your system if there is a bad bug in the new update!
+    ***sudo apt-get remove --purge "something"** :: Will completely remove the program specified, including any "crumbs" leftover.
+    ***sudo dpkg -l** :: This will display any programs/packages you currently have installed.  Useful to check what you have and don't have.
+=====Raspberry Pi / Electronics=====
+A useful beginner's guide on LEDs (especially how to calculate the ideal resistance):
+  * https://www.instructables.com/id/LEDs-for-Beginners/
+The Infrared LEDs we have (note the input voltage (1.5VDC) and amperage (50mA -> 0.05A)):
+  * https://www.sparkfun.com/products/9349
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