想通过WIFI连网，输入sudo ifup wlan0 提示interface wlan0 already configured.

verywell.

如题，正在学习配置无线网卡，输入sudo ifup wlan0之后教程上是出现一串
rfkill: Cannot open RFKILL control device
ioctl[SIOCSIWAP]: Operation not permitted
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
Internet Systems Consortium DHCP Client 4.2.2
Copyright 2004-2011 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/wlan0/a0:f3:c1:08:21:ac
Sending on LPF/wlan0/a0:f3:c1:08:21:ac
Sending on Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPOFFER from 192.168.1.1
DHCPACK from 192.168.1.1
Reloading /etc/samba/smb.conf: smbd only.
bound to 192.168.1.137 -- renewal in 39240 seconds.




结果我输入之后提示interface wlan0 already configured.
请问如何解决？