jeongho

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

jeongho

#https://cloud.google.com/compute/docs/disks/add-persistent-disk
#Formatting and mounting a persistent disk
sudo lsblk
sudo mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/[DEVICE_ID]
sudo mkdir -p /mnt/disks/[MNT_DIR]
sudo mount -o discard,defaults /dev/[DEVICE_ID] /mnt/disks/[MNT_DIR]
sudo chmod a+w /mnt/disks/[MNT_DIR]
sudo cp /etc/fstab /etc/fstab.backup
sudo blkid /dev/[DEVICE_ID]
echo UUID=`sudo blkid -s UUID -o value /dev/sdb` /mnt/disks/disk-1 ext4 discard,defaults,nofail 0 2 | sudo tee -a /etc/fstab

jeongho

Hyperparameter Optimization in H2O: Grid Search, Random Search and the Future

"Good, better, best. Never let it rest. 'Til your good is better and your better is best." - St. Jerome

Overview

H2O now has random hyperparameter search with time- and metric-based early stopping. Bergstra and Bengio[^1] write on p. 281:

Compared with neural networks configured by a pure grid search, we find that random search over the same domain is able to find models that are as good or better within a small fraction of the computation time.

jeongho

Grid Search (Hyperparameter Search) API

REST

The current implementation of the grid search REST API exposes the following endpoints:

• GET /<version>/Grids: List available grids, with optional parameters to sort the list by model metric such as MSE
• GET /<version>/Grids/<grid_id>: Return specified grid
• POST /<version>/Grids/<algo_name>: Start a new grid search
  • <algo_name>: Supported algorithm values are {glm, gbm, drf, kmeans, deeplearning}

jeongho

#!/usr/bin/env python
#https://matplotlib.org/examples/showcase/mandelbrot.html

#http://www.scipy-lectures.org/intro/numpy/auto_examples/plot_mandelbrot.html
"""
Mandelbrot set
==============

Compute the Mandelbrot fractal and plot it

jeongho

https://github.com/dnschneid/crouton/wiki/Build-kernel-headers-and-install-Virtualbox-(x86)

General info

This guide is tested on:
HP chromebook 14 (Celeron 2955U)
Acer c720 (i3-4005U)
Acer R11 CB5-132T-C1LK

However, it should work for any x86 chromebook. Just be sure you clone the right kernel source for your device.

jeongho

https://en.wikipedia.org/wiki/OpenMP
https://stackoverflow.com/questions/29057437/compile-openmp-programs-with-gcc-compiler-on-os-x-yosemite
https://stackoverflow.com/questions/30049486/what-does-gcc-without-multilib-mean

# reinstall gcc with --without-multilib
brew update
time brew reinstall gcc --without-multilib
real	41m52.433s
user	121m53.094s
sys	32m39.945s

jeongho

#!/usr/bin/env python
#https://stackoverflow.com/questions/2720014/upgrading-all-packages-with-pip
pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U

jeongho

csshx --login root 172.16.0.10[0-4]

------------------------------
ssh-keygen -t rsa -b 4096 -C $(hostname)@antarcticatec.com -P '' -f /root/.ssh/id_rsa

touch /root/.ssh/authorized_keys
chmod 400 /root/.ssh/authorized_keys

#add ssh public key to root's authorized_keys
vi /root/.ssh/authorized_keys

jeongho

#spring microservers in action pp90
#1. locate $JAVA_HOME/jre/lib/security directory
#2. backup {local,US_export}_policy.jar in $JAVA_HOME/jre/lib/security to a diff location 
#3. unzip Oracle JCE zip file
#4. copy {local,US_export}_policy.jar to $JAVA_HOME/jre/lib/security directory
#5. configure spring cloud config to use encryption

cd /tmp/ 
curl –k-LO "http://download.oracle.com/otn-pub/java/jce/8/jce_policy-8.zip" \
-H 'Cookie: oraclelicense=accept-securebackup-cookie' &&  \