Hack 21. Change the Case Using tr Command

by Ramesh

Convert a file to all upper-case using tr command as shown below.

  1. $ cat employee.txt
  2.  
  3. 100 Jason Smith
  4. 200 John Doe
  5. 300 Sanjay Gupta
  6. 400 Ashok Sharma
  7.  
  8. $ tr a-z A-Z < employee.txt
  9.  
  10. 100 JASON SMITH
  11. 200 JOHN DOE
  12. 300 SANJAY GUPTA
  13. 400 ASHOK SHARMA