vim: easy way to look code

gdb InsertionSort
Ctrl+x a / layout src

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/etc/vim/vimrc

set nu
set hlsearch

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grep -r 512 ~/src

grep -r -E -n -B1 -A1 "runnable|threads" ~/src/kern

-i skip the diff between a and A

-I skip .o

-w DEBUG_KMEMLEAK but not DEBUG_KMEMLEAK_EARLY_LOG_SIZE

-e "-lianghong"

find ~/gnuradio -name ben*