## Correct ways of deploying NFSv4

NFS is old. Its root can trace back to the remote file system in System V R3 while the first release of NFS (version 2) is in 1985 on SunOS 2.0. It must not be considered as a counterpart of Samba or CIFS, since NFS does not do user authentication... [more]

## Threshold linear regression

Threshold regression means to do regression separately in different segments, as separated by some threshold. Take linear models as example, we have a response variable $$y$$ and predictors $$X$$, and additionally, we have a discriminator $$q$$, which may be derived from $$X$$, and set of transition functions $$g_i$$. The model... [more]

## Converting a DD-WRT router to OpenWRT

I have an old WiFi router (not my gateway, but that doesn’t matter) that used to be running DD-WRT and I am experimenting with the WiFi mesh or 802.11r roaming at home. Unfortunately the DD-WRT version is too old to do either of these – it was a Linux 2.4... [more]