와이파이 지역 변경

재부팅하면 초기화된다.
(/etc/default/crda 수정 필요)

iw reg get
---------------------------
global
country 00: DFS-UNSET
        (755 - 928 @ 2), (N/A, 20), (N/A), PASSIVE-SCAN
        (2402 - 2472 @ 40), (N/A, 20), (N/A)
        (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
        (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
        (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
        (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
        (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
        (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
        (57240 - 63720 @ 2160), (N/A, 0), (N/A)

# sudo iw reg set US
sudo iw reg set KR

iw reg get
---------------------------
global
country US: DFS-FCC
        (902 - 904 @ 2), (N/A, 30), (N/A)
        (904 - 920 @ 16), (N/A, 30), (N/A)
        (920 - 928 @ 8), (N/A, 30), (N/A)
        (2400 - 2472 @ 40), (N/A, 30), (N/A)
        (5150 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
        (5250 - 5350 @ 80), (N/A, 24), (0 ms), DFS, AUTO-BW
        (5470 - 5730 @ 160), (N/A, 24), (0 ms), DFS
        (5730 - 5850 @ 80), (N/A, 30), (N/A), AUTO-BW
        (5850 - 5895 @ 40), (N/A, 27), (N/A), NO-OUTDOOR, AUTO-BW, PASSIVE-SCAN
        (5925 - 7125 @ 320), (N/A, 12), (N/A), NO-OUTDOOR, PASSIVE-SCAN
        (57240 - 71000 @ 2160), (N/A, 40), (N/A)

iw list
---------------------------
......
                Frequencies:
                        * 5955 MHz [191] (12.0 dBm) (no IR)
                        * 5975 MHz [195] (12.0 dBm) (no IR)
                        * 5995 MHz [199] (12.0 dBm) (no IR)
                        * 6015 MHz [203] (12.0 dBm) (no IR)
                        * 6035 MHz [207] (12.0 dBm) (no IR)
                        * 6055 MHz [211] (12.0 dBm) (no IR)
                        * 6075 MHz [215] (12.0 dBm) (no IR)
                        * 6095 MHz [219] (12.0 dBm) (no IR)
                        * 6115 MHz [223] (12.0 dBm) (no IR)
......
                        * 6895 MHz [379] (12.0 dBm) (no IR)
                        * 6915 MHz [383] (12.0 dBm) (no IR)
                        * 6935 MHz [387] (12.0 dBm) (no IR)
                        * 6955 MHz [391] (12.0 dBm) (no IR)
                        * 6975 MHz [395] (12.0 dBm) (no IR)
                        * 6995 MHz [399] (12.0 dBm) (no IR)
                        * 7015 MHz [403] (12.0 dBm) (no IR)
                        * 7035 MHz [407] (12.0 dBm) (no IR)
                        * 7055 MHz [411] (12.0 dBm) (no IR)
                        * 7075 MHz [415] (12.0 dBm) (no IR)
                        * 7095 MHz [419] (12.0 dBm) (no IR)
                        * 7115 MHz [423] (12.0 dBm) (no IR)
                        * 7135 MHz [427] (disabled)
                        * 7155 MHz [431] (disabled)
                        * 7175 MHz [435] (disabled)
                        * 7195 MHz [439] (disabled)
                        * 7215 MHz [443] (disabled)