How to adminrate a server

 

 

 

Memory

• top
  The top program provides a dynamic real-time view of a running system
  
  
• free
  Display amount of free and userd memory in the system

 

 

 

 

 

 

 

Storage

•  df
  report file system disk space usage
  
  
• iostat
  Report Central Processing Unit statistics and input/output statistics for devices and partitions
  
  
• iotop
  simple top-like I/O monitor

 

 

 

 

 

 

 

 

Network

• Iftop
  display bandwidth usage on and interface by host
  
  
• netstat
  PrintNetwork connections, routing tables, interface statistics, masquerage connections, and multicast memberhips