grep废弃

grep -inrw 字符串 .
grep -i是忽略大小写的意思
cat xxx|grep -i mem 会把文本里的MEM,meM.....等无关乎大小写的内容取出来
grep -inrw
grep "main()" . -r --include *.{php,html}
grep  -inrs "main()" . --include *.{php,html}
快速搜索：git grep -n order ./app/models    搜 order