∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

Brother Toner Reset

specific for Brother HL-4070CDW

October 25, 2017 blog system

Reset the toner print count on Brother printer: The toner cartridge doesn’t seem to carry counting chip. But the counter is held in the printer itself. To reset it, we have to go to service mode: [more]

bash string manipulation

October 18, 2017 blog system reference

Let $string be a string. [more]

Collateral Loan Obligations and others

September 15, 2017 blog work

Various thing about CLOs or other structured fixed income product. [more]

Work around Python GIL with Parallel Processes

August 14, 2017 blog code

This is the written version of my HKPyUG talk. My code is at github. [more]

Ciphers and OpenSSH

July 17, 2017 blog system

This is about how to configure OpenSSH. Especially many configuration parameters becomes aged in recent version of OpenSSH, most notably DSA keys are obsoleted and disabled by default. [more]