uname -a; cat /etc/centos-release
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Linux oak 3.10.0-693.5.2.el7.x86_64 #1 SMP Fri Oct 20 20:32:50 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
CentOS Linux release 7.4.1708 (Core)
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Linux oak 3.10.0-693.5.2.el7.x86_64 #1 SMP Fri Oct 20 20:32:50 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
CentOS Linux release 7.4.1708 (Core)
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root @ oak:~# lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 002: ID 148f:5572 Ralink Technology, Corp. RT5572 Wireless Adapter
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
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root @ oak:/etc/modprobe.d# lsmod | grep rs2800
root @ oak:/etc/modprobe.d# ifconfig -a
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.1.10 netmask 255.255.255.0 broadcast 10.0.1.255
inet6 fe80::c007:1e47:e0f7:858c prefixlen 64 scopeid 0x20<link>
ether fc:aa:14:c0:63:95 txqueuelen 1000 (Ethernet)
RX packets 217895602 bytes 324362979406 (302.0 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 18185227 bytes 4689250907 (4.3 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 637596 bytes 326164323 (311.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 637596 bytes 326164323 (311.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root @ oak:/etc/modprobe.d#
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root @ oak:~# modprobe rt2800usb
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root @ oak:~# tail /var/log/messages
Nov 12 20:15:01 oak NetworkManager[825]: <info> [1510539301.7978] device (wlp0s16f1u2): set-hw-addr: set MAC address to BE:8F:2C:F9:7A:07 (scanning)
Nov 12 20:15:02 oak kernel: IPv6: ADDRCONF(NETDEV_UP): wlp0s16f1u2: link is not ready
Nov 12 20:15:02 oak NetworkManager[825]: <info> [1510539302.7958] rfkill0: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:10.1/usb8/8-2/8-2:1.0/ieee80211/phy0/rfkill0) (driver rt2800usb)
Nov 12 20:15:02 oak NetworkManager[825]: <info> [1510539302.7987] supplicant: wpa_supplicant running
Nov 12 20:15:02 oak NetworkManager[825]: <info> [1510539302.7989] device (wlp0s16f1u2): supplicant interface state: init -> starting
Nov 12 20:15:02 oak NetworkManager[825]: <info> [1510539302.8502] sup-iface[0x564c1e4708a0,wlp0s16f1u2]: supports 4 scan SSIDs
Nov 12 20:15:02 oak NetworkManager[825]: <info> [1510539302.8520] device (wlp0s16f1u2): supplicant interface state: starting -> ready
Nov 12 20:15:02 oak NetworkManager[825]: <info> [1510539302.8522] device (wlp0s16f1u2): state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
Nov 12 20:15:02 oak kernel: IPv6: ADDRCONF(NETDEV_UP): wlp0s16f1u2: link is not ready
Nov 12 20:15:03 oak ModemManager[792]: <info> Couldn't check support for device at '/sys/devices/pci0000:00/0000:00:10.1/usb8/8-2': not supported by any plugin
Nov 12 20:15:13 oak NetworkManager[825]: <info> [1510539313.0663] device (wlp0s16f1u2): supplicant interface state: ready -> inactive