替换

ls -al `which ls` 或
ls -al $(which ls)

高亮显示 grep

locate ls.c | grep ls.c

查找 find

find ~ -name "*.c"

.c .cpp .sh .h 求总行数

sudo find ~ \( -name "*.[ch]" -o -name "*.sh" -o -name "*.cpp" \) -exec wc -l {} \; | xargs wc -l