All things corpus & applied linguistics (a bit of guitar too)
This free MOOC Offers practical introduction to the methodology of corpus linguistics for researchers in social sciences and humanities. It is an 8-week course and is run by Lancaster University.
More information here.
The basic command syntax is as follows:
perl -pi -w -e ‘s/THIS/THAT/g;’ /path/to/files*.txt
Read the post here.