How can I use the UNIX shell to count the number of times a letter appears in a text file?

Question

I have a few text files and I'd like to count how many times a letter appears in each?

Specifically, I'd like to use the UNIX shell to do this, in the form of: cat file | .... do stuff...

Is there a way I can get the wc command to do this?

question from:https://stackoverflow.com/questions/1368563/how-can-i-use-the-unix-shell-to-count-the-number-of-times-a-letter-appears-in-a

Answer 1

grep char -o filename | wc -l