Using find in Linux

find /etc -type f -exec grep network \{\} --with-filename \;
find /etc -type f -exec grep -i network \{\} --with-filename \;
find /etc -type f -exec grep '\-\z' \{\} --with-filename \; | less
find /etc -type f -exec grep '\[\[' \{\} --with-filename \;

find:
find . -type f -exec grep -i mysearchstring \{\} --with-filename \;


file
string
cat
grep
diff -Naur file1 file2


Other useful commands:
grep
head
tail
less
more
string

locate

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