unix

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Across
  1. 3. controls te kernel ring buffer
  2. 5. send icmp echo request to network hosts
  3. 7. display the current date
  4. 9. changes the access mode of a file
  5. 11. used to copy files
  6. 12. print last n lines of each file to standard output
Down
  1. 1. works with ip/kernel table
  2. 2. search for file in directory hierarchy
  3. 4. create the directories
  4. 5. print names of current/working directory
  5. 6. search for string in group of files
  6. 8. display message on terminal
  7. 10. convert content of input in different formats with octal format
  8. 11. to see the calender of any specific month