froop

// Command: java -Dsun.net.inetaddr.ttl=0 TestDnsQuotaByInetAddress 172.30.3.11
// Metric: ethtool -S eth0 | grep linklocal_allowance_exceeded
public class TestDnsQuotaByInetAddress {
  private static final int TRIALS = 10_000;
  private static final int THREADS = 1_024;
  private static final int LOG_THRESHOLD = 1_000;

  public static void main(String[] args) throws InterruptedException, ExecutionException {
    final String host = args[0];
    final ExecutorService executor = Executors.newFixedThreadPool(THREADS);

froop

Param($Major='6.2', $Minor='2', $Manager='172.30.3.10')

$PackageZip = "hinemos-agent-${Major}.${Minor}-1.win.zip"
$DownloadUrl = "https://github.com/hinemos/hinemos/releases/download/v${Major}.${Minor}/${PackageZip}"
$PackageMsi = "C:\HinemosAgentInstaller-${Major}.${Minor}_win.msi"
$InstallPath = "C:\Program Files (x86)\Hinemos\Agent${Major}.${Minor}"
$ServiceName = "Hinemos_${Major}_Agent"

(New-Object System.Net.WebClient).DownloadFile(${DownloadUrl}, "C:\${PackageZip}")
Expand-Archive -Path "C:\${PackageZip}" -DestinationPath "C:\"

froop

public class TestRaceConditionOfArrayList {
  private static final int NUMBER_OF_TRIALS = 1_000_000;
  private static final int NUMBER_OF_THREADS = 8;
  private static final List<Integer> SOURCE_LIST = Arrays.asList(1, 2);

  public static void main(String[] args) throws InterruptedException, ExecutionException {
    ExecutorService executor = Executors.newFixedThreadPool(NUMBER_OF_THREADS);
    List<Future<String>> futures = new ArrayList<>();
    Testee testee = new Testee();
    for (int i = 0; i < NUMBER_OF_TRIALS; i++) {

froop

Install-WindowsFeature SNMP-Service -IncludeAllSubFeature -IncludeManagementTools
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\SNMP\Parameters\ValidCommunities" -Name "public" -Value 4 -type DWord
Remove-Item -Path "HKLM:\SYSTEM\CurrentControlSet\Services\SNMP\Parameters\PermittedManagers"
#Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\SNMP\Parameters\PermittedManagers" -Name "1" -Value "localhost" -type String
#Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\SNMP\Parameters\PermittedManagers" -Name "2" -Value "172.30.3.10" -type String
Restart-Service -Name SNMP
New-NetFirewallRule -DisplayName "SNMP Service" -Direction Inbound -Protocol UDP -LocalPort 161 -Action Allow

froop

$URL = "https://javadl.oracle.com/webapps/download/AutoDL?BundleId=246808_424b9da4b48848379167015dcc250d8d" # 8u341
#$URL = "https://javadl.oracle.com/webapps/download/AutoDL?BundleId=246474_2dee051a5d0647d5be72a7c0abff270e" # 8u333
#$URL = "https://javadl.oracle.com/webapps/download/AutoDL?BundleId=245807_df5ad55fdd604472a86a45a217032c7d" # 8u321
#$URL = "https://javadl.oracle.com/webapps/download/AutoDL?BundleId=245479_4d5417147a92418ea8b615e228bb6935" # 8u311
(New-Object System.Net.WebClient).DownloadFile($URL, "C:\jre8.exe")
cmd /C "C:\jre8.exe" /s
[System.Environment]::SetEnvironmentVariable("JAVA_HOME", "C:\Program Files\Java\jre1.8.0_341", "Machine")
Remove-Item "C:\jre8.exe"

froop

import re
with open('/content/drive/MyDrive/input.tsv') as file:
  for line in file:
    res = re.match('^([^\t]+)\t([^\t]+)\t.{3}([^\t]+)\t([^\t]+)$', line)
    print('%s\t%s\t%s' % (res.group(2), res.group(4), bytes.fromhex(res.group(3))))

froop

set /P TEMPLATE_ID=Template ID:

aws ec2 run-instances ^
  --launch-template LaunchTemplateId=%TEMPLATE_ID% ^
  > ec2-run-instance.log
REM change instance type: --instance-type t3.nano ^

aws ec2 describe-instances ^
  --filters ^
    "Name=tag:aws:ec2launchtemplate:id,Values=%TEMPLATE_ID%" ^

froop

#cloud-config
timezone: Asia/Tokyo
runcmd:
  - cd /home/centos
  - curl -L -o init-os.sh https://gist.github.com/froop/224549dad2a39c584b571ee16ca66142/raw/init-centos7-ec2.sh
  - chmod +x init-os.sh
  - ./init-os.sh
  - rm init-os.sh

froop

#!/bin/bash -eu

# locale
localectl set-locale LANG=ja_JP.UTF-8

# timezone
echo 'ZONE="Asia/Tokyo"' > /etc/sysconfig/clock
rm -f /etc/localtime
ln -fs /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

froop

import httplib
con = httplib.HTTPConnection('172.31.1.12', 80)
con.request('GET', '/')
res = con.getresponse()
print(res.status)