my shell script cheat sheet

1. find the total line number of a fold for some files:

find test -iname *.java | xargs wc -l | tail -1

2. count # of files in each folder recursively

for t in `find . -type d -ls | awk '{print $11}'`; do echo "$t `find $t -type f  | wc -l`" ; done > ~/count.txt

insert control character with vi

insert a visible ^A, we must use: <ctrl> + v + a.