kd7yhr.org misc

Useful One Liners

• Change a string matching a regex in a file or files:
  perl -p -i -e 's/val=/value=/g' filename
• Kill a line matching a specific regex:
  perl -n -l -i -e 'print if !/P3P/' filename
• To convert a dos file to unix: cat filename.txt | tr -d '\r' > new_filename.txt