[Novalug] bash commands

[Nino Pereira]

Hi you bash experts,

I'd like to search all the files in a directory
for the occurrence of a particular
string. It must be something like

do (until you have had all the files)
   cat *.f | grep --with-filename 'string'
od

but I don't have an example to modify from. Can you point me
to one?

Thank you,

Nino