Due to the nature of most of the topics in this section, I will not be covering everything. They are things that any student that has taken Intro to IT, D315, or A+ cert will understand. I will cover topics on specific folders where processes occur and anything that may merit notation that was not found in previous courses. If you are looking for more information on this section, please read Section 4. 2 pages 266-275

• /proc/cpuinfo contains detailed info on system processor
  • lscpu provides a general result
• free command reveals how much memory is available

(https://www.geeksforgeeks.org/linux-unix/free-command-linux-examples/)

**Always look at what the command results look like to get an idea of what data can be pulled from the command.

• lsblk command lists block devices available (usually storage devices/partitions)

  • mmcblk usually refers to sd cards like from Raspberry Pi devices

• /dev where device files are found and identify physical devices, device access, and supported drivers

  • /dev/sda references the entire first storage device
  • /dev/sda3 references partition 3 in the first device

• When looking to find out what command is used for GPT vs MBR partitions

  • GPT - look for a g in the command -example gdisk
  • MBR - look for an f in the command - example fdisk

• To view all of the processes in the system

  • ps -e
  • ps -aux

• changing kernel parameters

  • add entries to /etc/sysctl.conf

• file that contains information passed to the kernel at boot time

  • /proc/cmdline

• logging daemon on recent Linux distributions based on systemd

  • this is located journald

    Collects and stores log messages from:

    • Kernel
    • Init system
    • Services
    • User processes

**Some are from information covered on Cisco rather than the textbook. Most of the hardware section was rudimentary

General Comparison to understand between HDD and SSD