Ming Fang mingfang

## shell.go
package main

import (
    "context"
    "flag"
    "os"
    "os/exec"

    "go.uber.org/cadence/.gen/go/cadence/workflowserviceclient"
    "go.uber.org/cadence/activity"

## Alluxio.ipynb

      
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                mingfang
                / Alluxio.ipynb
            
            
              Created Apr 29, 2019
            
          
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## screensaver.sh
#!/bin/bash

while true
do
  if ping -c 1 -w 3 192.168.2.67 &> /dev/null || hcitool scan | grep -q -E "ming-macbook|Ming's iPhone" ; then
    echo "welcome back. turning screen on"
    echo 0 | sudo tee /sys/class/backlight/rpi_backlight/bl_power
  else
    echo "you're gone. turning screen off"
    echo 1 | sudo tee /sys/class/backlight/rpi_backlight/bl_power

## pgcalc.sh
#!/bin/bash

#Computes the suggested PG count similar to this http://ceph.com/pgcalc/

#Reguirements:
#  - must run on ceph admin
#  - depends on awk, wc and bc commands

#Limitations:
#  - Assumes same OSD# for all pools

## gulpfile.js
// DO NOT CHANGE //

const gulp = require('gulp');
const webpack = require('webpack');
const WebpackDevServer = require('webpack-dev-server');
const gwebpack = require('webpack-stream');
const browserSync = require('browser-sync');
const runSequence = require('run-sequence');
const debug = require('gulp-debug');
const cache = require('gulp-cached');

## show vm ip
virt-cat -d vm1 /var/lib/dhcp/dhclient.eth0.leases

## gist:dcc5203c78775b9f4f8f
lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL

## public ip
curl -s checkip.dyndns.org | sed -e 's/.*Current IP Address: //' -e 's/<.*$//'

## gist:d7668c6a54079d613f89
iptables -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m recent --set --name SSH --rsource
iptables -A INPUT -p tcp -m tcp --dport 22 -m recent --rcheck --seconds 30 --hitcount 4 --rttl --name SSH --rsource -j REJECT --reject-with tcp-reset
iptables -A INPUT -p tcp -m tcp --dport 22 -m recent --rcheck --seconds 30 --hitcount 3 --rttl --name SSH --rsource -j LOG --log-prefix "SSH brute force "
iptables -A INPUT -p tcp -m tcp --dport 22 -m recent --update --seconds 30 --hitcount 3 --rttl --name SSH --rsource -j REJECT --reject-with tcp-reset
iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT

#based on https://rudd-o.com/linux-and-free-software/a-better-way-to-block-brute-force-attacks-on-your-ssh-server

## convert id_rsa to pem
openssl rsa -in ~/.ssh/id_rsa -outform pem > id_rsa.pem
chmod 700 id_rsa.pem