kk Blog —— 通用基础

[root@localhost~]# modprobe pcspkr
[root@localhost~]# lsmod | grep pcspkr
pcspkr    20000

[root@localhost~]# rmmod pcspkr

[root@localhost~]# vim /etc/modprobe.d/blacklist.conf
blacklist pcspkr


[root@localhost~]# vim /etc/rc.local
/sbin/rmmod pcspkr

insert into tablename (字段名1,字段名2,...,字段名3) select 字段名1,字段名2,...,字段名3 from tablename where id=...

insert into tb (a, b, c)  select  '20211015', b, c from tb where id=123;