regex - ngrep 如何使匹配表达式不区分大小写？

Question

引自手册页

match expression
A  match  expression  is either an extended regular expression, or if the -X
option is specified, a string signifying a hexadecimal value.   An  extended
regular  expression  follows  the  rules  as  implemented  by  the GNU regex
library.  Hexadecimal expressions can optionally be preceded by `0x'.  E.g.,
`DEADBEEF', `0xDEADBEEF'.

对于 (e)grep 我使用 -i，但是如何编写不区分大小写的 ngrep 匹配表达式？

例如

sudo ngrep -xqtd lo0 select port 3306

不会匹配 mysql --protocol=tcp -e "Select 1" 吗？

Answer 1

如 man page 中所读，你有 -i 选项:

-i

Perform a case-insensitive search.