kashyapp

echo 255|sudo tee /proc/sys/net/netfilter/nf_conntrack_log_invalid
echo ipt_LOG|sudo tee /proc/sys/net/netfilter/nf_log/2

See https://home.regit.org/2014/02/nftables-and-netfilter-logging-framework/

kashyapp

// ssh -D 1080 remotehost
// save this file as something like /usr/local/etc/proxy.pac
// point your browser auto proxy config to this as file:///usr/local/etc/proxy.pac
function FindProxyForURL(url, host) {
    PROXY = "SOCKS localhost; DIRECT"

    // Apple.com via proxy
    if (shExpMatch(host,"10.0.*")) {
        return PROXY;
    }

kashyapp

#!/bin/bash -e
/usr/share/fk-3p-kafka/bin/kafka-topics.sh $ZOOKEEPER  --describe  --topic $1 \
| grep Leader \
| awk '{print $4,$8}' | sed 's/,/ /' \
| awk  '{
                for(i=1;i<7;++i){a[i]=0}; 
                sum[$2]++; sum[$3]++;
                a[$2]=1; a[$3]=1; 
                printf "%3d ",$1;
                for (i=1;i<7;++i) {printf "%3d ",a[i]}; printf "\n";

kashyapp

TLDR

If a program is writing to stdout, there is a big risk that if the other end of the pipe is frozen, the program itself will hang.

from a previous instance, not shutdown cleanly

root@bigfoot-kafka3:/etc/service/fk-3p-kafka/log/main# fuser *
current:             32391
lock:                32391

kashyapp

The Device

SheevaPlug JTAGKey FT2232D B:
  Product ID:  0x9e8f
  Vendor ID:	0x9e88

Install FTDI Driver for OS X

Download and install FTDI VCP driver from http://www.ftdichip.com/Drivers/VCP.htm

Patch it

to identify our device

kashyapp

#!/bin/bash -e
set -x

NAME=steelman
BOOTDISK=boot-steelman

if ! ./gcutil getinstance --zone=us-central1-a ${NAME}; then
        ./gcutil addinstance \
                --zone=us-central1-a \
                --disk=${BOOTDISK},boot \

kashyapp

# all could be a single apt-get install of course. Broken down only for clarity.
apt-get install build-essential 
apt-get install libicu-dev
apt-get install libmozjs185-dev
apt-get install libcurl4-openssl-dev
apt-get install erlang-dev erlang-eunit erlang-manpages erlang-nox

kashyapp

@import url(http://fonts.googleapis.com/css?family=Open+Sans:300);
body {
    font-family: helvetica,arial,freesans,clean,sans-serif;
}

#head h1,
.markdown-body h2,
.markdown-body h1 {
    font-weight: 300;
    font-family: 'Open Sans', helvetica, sans-serif;

kashyapp

var r = require('redis');
r.debug_mode = true;

var redis = r.createClient(),
    allRows = [],
    migrated = 0;

redis.on("end", function(){
  console.log("we should be done here");
});

kashyapp

import com.yammer.dropwizard.util.Duration;

import com.google.common.cache.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.*;

import static com.google.common.base.Throwables.propagateIfInstanceOf;

public class LocalAppConfigStorage implements AppConfigStorage {