Centos 5 wireless problem SIOCSIFFLAGS: No such file or directory

0. Connect as a root user.

1. First of all determine which wireless card you have:

/sbin/lspci | grep Wireless

My output is :

02:00.0 Network controller: Intel Corporation PRO/Wireless5100 ANG…

1.Download firmware from here.(This is for 5100,5300 and 5350 (iwlang))

2. Install downloaded package:

rpm -Uvh iwl5000-firmware-8.24.2.12-1.elrepo.noarch.rpm

3. Reload iwlagn module

modprobe -r iwlagn;
modprobe iwlagn

4. Start wlan0

ifconfig wlan0 up

5. Enable Network Manager:

chkconfig NetworkManager on
service NetworkManager start

That’s all!