Monday, January 26, 2015

The asteroid named "2004 BL86" is coming close to the Earth orbit

The asteroid named "2004 BL86" will come about 745,000 miles (1.2 million kilometers) from Earth, about 3 times of distance between the Earth and Moon. The asteroid is about 500 meters in diameter and there is no chance that this space object will directly impact with our Earth for let's say another 1 thousand years when next time this asteroid will be visiting again. Since there is a widely discussed theory that water and possible life on the Earth were brought in by asteroids and/or meteors from outer space, scientists are jumping in to track and observe this asteroid with modern tools available such as radar or telescope and see what's on its surface. At least we can do our own mankind a favor by documenting this rare event today. Hope our future generations will be able to land intelligent objects or human beings on its surface next time and eventually develop a way to capture/divert/destroy any asteroids or meteors which post impact thread to the Earth. 

Diagram showing the close passage of 2004 BL86 on January 26, 2015

Sunday, January 25, 2015

Sycamore Grove Park at Livermore California

Sycamore Grove Park is a local community park right in the heart of Livermore valley vineyards. Just like its name suggests, the park has the most beautiful sycamore and oak trees in Tri-Valley in San Francisco bay. Tens of different spices such as frogs, turtles, deers and wild turkeys call this park home. The park has a ~2.5 mile paved trail and a few unpaved trails good for hiking and leisure biking. This place has a few play grounds and picnic areas good for family get-together. Livermore has been working hard to change its public image. Cattle ranches and agriculture used to dominate the local economy not very long ago.  Livermore is no longer a cowboy town anymore and it's now rare to run into any cowboy boots or guns in the area. There are a few good wineries around this area such Wente, Bent Creek and Steven Kent Winery all together produce good quality wines from Chardonnay, Pinot Grigio to Shiraz. Even the overall wine quality and brand name recognition are not as popular as its neighboring Napa Valley wine country in the north, Livermore wineries have been emerging as strong players and most recently won big in the 2014 SF Chronicle Wine Competition.


Tuesday, January 20, 2015

George W Bush: "I earned capital in the campaign, political capital, and now I intend to spend it."

Obama: "“I have no more campaigns to run. I know because I won them both.”

Hillary Clinton: "If I want to knock off a front page, I just need to change my hairstyle." -- If so then why run another campaign?

Sunday, January 18, 2015

Little one turns 7 today. It has been extremely rewarding to raise good kids and see them growing up. Happy birthday son!

Saturday, December 18, 2010

An effective way to silence a disgruntle company

Bank of America, the largest US bank, for becoming the latest institution to
halt financial transactions for Wikileaks after MasterCard, PayPal, Visa Europe
and others did the same, under self censorship or pressure from US government.
Can Chinese companies exercise the same strategy to cease relationship by not
running ads on any Google sites?

Monday, October 11, 2010

Setup ssh tunnel

ssh -f -t -L <locl_port>:<remote_host>:<remote_port>
<user_login>@<gateway_server>

pam_access(sshd:account): access denied for user `xxxx' from 10.10.10.1

Why?

User 'xxxx' has not been allowed by PAM access control.

Solution:

1. Update access.conf to ass user 'xxxxx'

+:user_xxx:ALL

2. Add pam.d/sshd following line if needed

account required pam_access.so