Unix for Advanced Users

7. Viewing System Information

• 7.1. System/OS ID:
  7.1.1. What is my machine name? hostname
  7.1.2. What is my OS version? uname
  7.1.3. What is my system's unique ID?
  7.1.4. What is my system's MAC address?
  7.1.5. What is my machine architecture? arch
  7.1.6. Where can I get all this at once? sysinfo
• 7.2. The Health/Status of the System:
  7.2.1. How long has the system been up? uptime
  7.2.2. How loaded is my system? xload
  7.2.3. What's eating up all the CPU time/memory? top
  7.2.4. How come the disk is full? df
  7.2.5. Where is all that boot-time gobblygook? dmesg
• 7.3. User/Login info:
  7.3.1. Who's logged on the system now? who
  7.3.2. What are they doing? w
  7.3.3. Who's been logging into the system? last