1. 1. Perl Oneliners
2. 2. Install Perl
3. 3. Oneliners
4. 1. 3.1. Print the version of Perl
   2. 3.2. Print a number, use Perl as your calculator
   3. 3.3. Print a string
   4. 3.4. grep on Windows as well
   5. 3.5. Rename many files
   6. 3.6. Replace a string in many files
   7. 3.7. Replace one line with an empty row
   8. 3.8. Change encoding
   9. 3.9. print the 3rd field of every line in a CSV file
   10. 3.10. Print all usernames from /etc/passwd
   11. 3.11. Remove one line from a file