sed 搜索並替換

find . -type f -exec sed -i "s/std=c++11/std=c++14/g" {} \;

搜索當前目錄下的文件，把std=c++11替換成std=c++14，注意{}和\之間有個空格。

全詞替換

$ echo "bar embarassment" | sed "s/\bbar\b/no bar/g"
no bar embarassment

\b in regular expressions match word boundaries (i.e. the location between the first word character and non-word character):