BBB网络连接更新时间

BBB通过USB连接互联网的设置：

root@beaglebone:~# /sbin/route add default gw 192.168.7.1
root@beaglebone:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_req=1 ttl=43 time=207 ms
64 bytes from 8.8.8.8: icmp_req=2 ttl=43 time=210 ms
64 bytes from 8.8.8.8: icmp_req=3 ttl=44 time=203 ms
^C
--- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 203.514/206.953/210.227/2.743 ms
root@beaglebone:~#

设置网关，此步骤在BBB重启后消失。

可以修改下面文件.profile来实现永久性修改：

root@beaglebone:~# vi .profile
# ~/.profile: executed by Bourne-compatible login shells.

if [ "$BASH" ]; then
  if [ -f ~/.bashrc ]; then
    . ~/.bashrc
  fi
fi

mesg n
/sbin/route add default gw 192.168.7.1
~
~
".profile" 10L, 179C                                          1,1           All

 更新时间：

root@beaglebone:~# date
Wed Apr 23 20:47:21 UTC 2014
root@beaglebone:~# /usr/sbin/ntpdate -b -s -u cn.pool.ntp.org
root@beaglebone:~# date
Wed May 22 01:42:41 UTC 2019

与实际时间差8小时，这是由于时区设置导致。

设置时区为上海：

root@beaglebone:~# cat /etc/localtime
TZif2UTCTZif2UTC
UTC0
root@beaglebone:~# ls /usr/share/zoneinfo/Asia/
Aden       Choibalsan   Irkutsk       Kuwait        Qyzylorda  Tokyo
Almaty     Chongqing    Istanbul      Macao         Rangoon    Ujung_Pandang
Amman      Chungking    Jakarta       Macau         Riyadh     Ulaanbaatar
Anadyr     Colombo      Jayapura      Magadan       Saigon     Ulan_Bator
Aqtau      Dacca        Jerusalem     Makassar      Sakhalin   Urumqi
Aqtobe     Damascus     Kabul         Manila        Samarkand  Ust-Nera
Ashgabat   Dhaka        Kamchatka     Muscat        Seoul      Vientiane
Ashkhabad  Dili         Karachi       Nicosia       Shanghai   Vladivostok
Baghdad    Dubai        Kashgar       Novokuznetsk  Singapore  Yakutsk
Bahrain    Dushanbe     Kathmandu     Novosibirsk   Taipei     Yekaterinburg
Baku       Gaza         Katmandu      Omsk          Tashkent   Yerevan
Bangkok    Harbin       Khandyga      Oral          Tbilisi
Beirut     Hebron       Kolkata       Phnom_Penh    Tehran
Bishkek    Ho_Chi_Minh  Krasnoyarsk   Pontianak     Tel_Aviv
Brunei     Hong_Kong    Kuala_Lumpur  Pyongyang     Thimbu
Calcutta   Hovd         Kuching       Qatar         Thimphu
root@beaglebone:~# cp /usr/share/zoneinfo/Asia/Shanghai /etc
root@beaglebone:~# rm /etc/localtime
root@beaglebone:~# ls /etc/Sh*
/etc/Shanghai
root@beaglebone:~# cd /etc/
root@beaglebone:/etc# mv Shanghai localtime
root@beaglebone:/etc# ls -l loc*
-rw-r--r-- 1 root root 2570 Dec 23  2013 locale.alias
-rw-r--r-- 1 root root 8554 Aug 14  2014 locale.gen
-rw-r--r-- 1 root root  405 May 22 13:37 localtime
root@beaglebone:/etc# cd ..
root@beaglebone:/# date
Wed May 22 13:41:08 CST 2019
root@beaglebone:/#

设置完成。