Linux-Ubuntu | lsof (LiSt Open Files)
  1. List open files
  2. List network connections
  3. List open files of a specific user
  4. List open files of a specific process
  5. List processes listening on specific port
  6. Kill processes of a specific user
  1. List open files 
    $ lsof
  2. List network connections 
    $ lsof -i
  3. List open files of a specific user 
    $ lsof -u mtitek
  4. List open files of a specific process 
    $ lsof -p 896
  5. List processes listening on specific port 
    $ lsof -i TCP:8080
  6. Kill processes of a specific user 
    $ kill -9 `lsof -t -u mtitek`
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