sed 用法筆記

替換每行中頭一次出現的test  

sed -i "s/test/design/" /var/tmp/a

整行範圍內替換

sed -i "s/test/design/g" /var/tmp/a

刪除以design開頭的行中test

sed -i "/^design*/s/ test//g" /var/tmp/a