1、ack
yum install ack
2、ag
git clone https://github.com/ggreer/the_silver_searcher.git
yum install automake pkgconfig pcre-devel zlib-devel xz-devel
cd the_silver_searcher
./build.sh
sudo make install
3、fzf（模糊查找）
git clone --depth https://github.com/junegunn/fzf.git ~/.fzf
~/.fzf/install