How to count the total number of lines in multiple files using a bash script

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Method 1

awk 'END {print NR}' *.java

wc -l *.php

For windows Command line:

for %G in (*.sql) do find /c /v "_+_" %G

For linux Command Line:

wc -l *.sh

cat *.java | wc -l

Using find to generate a list of files, useful when files are in sub directories.

wc -l `find -name '*.java'`