$ mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

// mysql停止
$ service mysqld stop

// rootユーザのアクセス権限が失われている
// → テーブル権限をスキップ(無視)して作業するオプション付きでセーフモードでmysql起動
$ mysqld_safe --skip-grant-tables &

// rootユーザでアクセス
$ mysql -u root

// 現状の権限設定テーブルを空にする
mysql> TRUNCATE TABLE mysql.user;
Query OK, 0 rows affected (0.00 sec)

// 権限反映
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

// rootユーザにlocalhostの全DBアクセス権限付与
mysql> GRANT ALL PRIVILEGES on *.* to root@localhost IDENTIFIED BY '(root's password)' WITH GRANT OPTION;
Query OK, 0 rows affected (0.01 sec)

// 権限反映
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

// 権限設定確認
mysql> SELECT host, user FROM mysql.user;

// mysql CLIモード停止 (Ctl+c)でもOK
mysql> quit;

// safe modeで起動させたmysql 関連psをkillする
$ ps aux | grep mysql | grep -v grep | awk '{print "kill -9", $2}'|sh

// mysql 起動
$ service mysqld start

// rootユーザでmysqlアクセス
$ mysql -u root -p(root's password)
mysql>

$ sudo yum install -y npm --enablerepo=epel

$ npm -v
1.3.6

$ sudo npm install -g hubot coffee-script yo generator-hubot

$ hubot -v
2.17.0

$ coffee -v
CoffeeScript version 1.10.0

$ mkdir mybot
$ cd mybot
$ yo hubot

? ==========================================================================
We're constantly looking for ways to make yo better!
May we anonymously report usage statistics to improve the tool over time?
More info: https://github.com/yeoman/insight & http://yeoman.io
========================================================================== (Y/n) n
                     _____________________________
                    /                             \
   //\              |      Extracting input for    |
  ////\    _____    |   self-replication process   |
 //////\  /_____\   \                             /
 ======= |[^_/\_]|   /----------------------------
  |   | _|___@@__|__
  +===+/  ///     \_\
   | |_\ /// HUBOT/\\
   |___/\//      /  \\
         \      /   +---+
          \____/    |   |
           | //|    +===+
            \//      |xx|

? Owner (User <user@example.com>) tech@xxxxxxxx.jp
? Bot name (mybot) hubot
? Description xxxxxxx's hubot
? Bot adapter slack
...
...
hubot-maps@0.0.2 node_modules/hubot-maps

$ ls
Procfile   bin                    hubot-scripts.json  package.json
README.md  external-scripts.json  node_modules        scripts

Error: EACCES, permission denied '/root/.config'
    at Object.fs.mkdirSync (fs.js:654:18)
    at sync (/usr/lib/node_modules/yo/node_modules/configstore/node_modules/mkdirp/index.js:71:13)
    at Function.sync (/usr/lib/node_modules/yo/node_modules/configstore/node_modules/mkdirp/index.js:77:24)
    at Object.create.all.get (/usr/lib/node_modules/yo/node_modules/configstore/index.js:38:13)
    at Object.Configstore (/usr/lib/node_modules/yo/node_modules/configstore/index.js:27:44)
    at new Insight (/usr/lib/node_modules/yo/node_modules/insight/lib/index.js:37:34)
    at Object.<anonymous> (/usr/lib/node_modules/yo/lib/cli.js:156:11)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)

# mkdir /root/.config
# chmod -R 0777 /root/.config

$ sudo npm install hubot-slack --save

$ echo '[]' > external-scripts.json

// confirm setting.
$ cat external-scripts.json
[]

$ vim bin/hubot

#!/bin/sh

set -e

npm install
export PATH="node_modules/.bin:node_modules/hubot/node_modules/.bin:$PATH"

# add start
export HUBOT_SLACK_TOKEN=xoxb-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
export PORT=80
# add end

exec node_modules/.bin/hubot --name "hubot" "$@"

$ vim scripts/hello.coffee

# Description:
#   hubot basic command.
#
# Commands:
#   hubot who are you - I'm hubot!
#   hubot hello
#   hubot who am I - You are <user_name>
#   hubot what is this <*> - This is <$1>

module.exports = (robot) ->
  robot.respond /who are you/i, (msg) ->
    msg.send "I'm hubot!"

  robot.hear /HELLO$/i, (msg) ->
    msg.send "hello!"

  robot.respond /who am I/i, (msg) ->
    msg.send "You are #{msg.message.user.name}"

  robot.respond /what is this (.*)/i, (msg) ->
    msg.send "This is #{msg.match[1]}"

$ sudo bin/hubot -a slack

[Wed Jan 13 2016 13:43:08 GMT+0900 (JST)] INFO Connecting...
[Wed Jan 13 2016 13:43:10 GMT+0900 (JST)] INFO Logged in as hubot of RUBY GROUPE, but not yet connected
[Wed Jan 13 2016 13:43:11 GMT+0900 (JST)] INFO Slack client now connected

$ bin/hubot -a slack

[Wed Jan 13 2016 16:40:59 GMT+0900 (JST)] INFO Connecting...
[Wed Jan 13 2016 16:40:59 GMT+0900 (JST)] ERROR Error: listen EACCES
  at errnoException (net.js:905:11)
  at Server._listen2 (net.js:1024:19)
  at listen (net.js:1065:10)
  at net.js:1147:9
  at dns.js:72:18
  at process._tickCallback (node.js:442:13)

[Wed Jan 13 2016 16:41:00 GMT+0900 (JST)] INFO Logged in as hubot of RUBY GROUPE, but not yet connected
[Wed Jan 13 2016 16:41:02 GMT+0900 (JST)] INFO Slack client now connected

/invite @hubot

[me]    hubot hello
[hubot] hello!

$ sudo npm install --save forever

$ forever --version
v0.15.1

$ echo 'export PATH=$PATH:/home/<user>/mybot/node_modules/forever/bin' >> ~/.bashrc
$ source ~/.bashrc

// change to super user.
$ sudo su
# echo 'export PATH=$PATH:/home/<user>/mybot/node_modules/forever/bin' >> ~/.bashrc
# source ~/.bashrc
# echo $PATH
.......:/home/<user>/mybot/node_modules/forever/bin:......

$ sudo bin/hubot start

$ sudo bin/hubot stop

$ sudo bin/hubot restart

$ sudo su
# forever list

info:    Forever processes running
data:        uid  command script                           forever pid   id logfile                 uptime
data:    [0] sICk coffee  node_modules/.bin/hubot -a slack 30494   30496    /root/.forever/sICk.log 0:0:5:35.399

$ ps aux | grep hubot | grep -v grep

root     31144  0.3  3.1 723820 32392 ?        Ssl  17:58   0:00 /usr/bin/node /home/hu/mybot/node_modules/forever/bin/monitor node_modules/.bin/hubot
root     31146  1.1  6.7 979588 69196 ?        Sl   17:58   0:00 node node_modules/hubot/node_modules/.bin/coffee /home/hu/mybot/node_modules/.bin/hubot -a slack

// kill forcibly process
$ sudo kill -9 31146

# ps aux | grep hubot | grep -v grep | awk '{print "kill -9", $2}' | sh

$ sudo gem install -n /usr/local/bin cocoa pods

$ pod install
[!] Unable to load a specification for the plugin `/opt/homebrew-cask/Caskroom/cocoapods/0.37.0/CocoaPods.app/Contents/Resources/bundle/lib/ruby/gems/2.2.0/gems/cocoapods-plugins-install-0.0.1`
Analyzing dependencies

CocoaPods 1.0.0.beta.1 is available.
To update use: `sudo gem install cocoapods --pre`
[!] This is a test version we'd love you to try.

For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.

Downloading dependencies
Installing Realm (0.97.0)
Installing RealmSwift (0.97.0)
Generating Pods project
2015-12-31 10:51:38.680 ruby[6275:47591] [MT] DVTAssertions: ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-9548/IDEFoundation/Initialization/IDEInitialization.m:590
Details:  Assertion failed: _initializationCompletedSuccessfully
Function: BOOL IDEIsInitializedForUserInteraction()
Thread:   <NSThread: 0x7fc66d067980>{number = 1, name = main}
Hints: None
Backtrace:
  0  0x000000010e001f7f -[DVTAssertionHandler handleFailureInFunction:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in DVTFoundation)
  1  0x000000010e00170c _DVTAssertionHandler (in DVTFoundation)
  2  0x000000010e001978 _DVTAssertionFailureHandler (in DVTFoundation)
  3  0x000000010e0018da _DVTAssertionFailureHandler (in DVTFoundation)
  4  0x0000000110e5154d IDEIsInitializedForUserInteraction (in IDEFoundation)
  5  0x000000011393a631 +[PBXProject projectWithFile:errorHandler:readOnly:] (in DevToolsCore)
  6  0x000000011393c1b6 +[PBXProject projectWithFile:errorHandler:] (in DevToolsCore)
  7  0x00007fff93b2af14 ffi_call_unix64 (in libffi.dylib)
zsh: abort      pod install

# 既にインストール済みのCocoaPodsをアンインストールする
$ sudo gem uninstall cocoapods

# 再度 `cocoapods` をインストールする。
$ sudo gem install  -n /usr/local/bin cocoapods

$  pod install
Updating local specs repositories

CocoaPods 1.0.0.beta.1 is available.
To update use: `gem install cocoapods --pre`
[!] This is a test version we'd love you to try.

For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.

Analyzing dependencies
Downloading dependencies
Installing Realm (0.97.0)
Installing RealmSwift (0.97.0)
Generating Pods project
Integrating client project

[!] Please close any current Xcode sessions and use `Chapter6.xcworkspace` for this project from now on.
Sending stats
Pod installation complete! There is 1 dependency from the Podfile and 2 total pods
installed.

~/honki_swift/Chapter6/LESSON31/before/Chapter6

[~/honki_swift/Chapter6/LESSON31/before/Chapter6]$ tree -L 1
.
├── Chapter6
├── Chapter6.xcodeproj
├── Chapter6.xcworkspace
├── Podfile
├── Podfile.lock
└── Pods

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "ec2:Describe*",
                "ec2:DisassociateAddress",
                "ec2:AssociateAddress"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

[Instance A & B ]# yum install -y git

[Instance A & B ]# git --version

git version 1.8.3.1

[Instance A & B ]# yum --disableexcludes=main install -y gcc
[Instance A & B ]# yum install -y gmp gmp-devel
[Instance A & B ]# yum install -y php php-mysql httpd libxml2-devel net-snmp net-snmp-devel curl-devel gettext
[Instance A & B ]# echo '<?php print_r($_SERVER["SERVER_ADDR"]); ?>' > /var/www/html/index.php
[Instance A & B ]# systemctl start httpd
[Instance A & B ]# systemctl enable httpd

# バックアップ確保
[Instance A & B ]# cp /etc/sysconfig/clock /etc/sysconfig/clock.org

# 再起動しても設定維持する様にする。
[Instance A & B ]# echo -e 'ZONE="Asia/Tokyo"\nUTC=false' > /etc/sysconfig/clock

# バックアップ確保
[Instance A & B ]# cp /etc/localtime /etc/localtime.org

# Asia/Tokyo を localtime に設定
[Instance A & B ]# ln -sf  /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

[Instance A & B ]# date

[Instance A ]# uname -n
ip-10-0-0-10.ap-northeast-1.compute.internal

[Instance B ]# uname -n
ip-10-0-1-10.ap-northeast-1.compute.internal

[Instance A & B ]# vi /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

# 以下追加
10.0.0.20 ip-10-0-0-20.ap-northeast-1.compute.internal
10.0.1.20 ip-10-0-1-20.ap-northeast-1.compute.internal

[Instance A & B ]# yum -y install pcs fence-agents-all

[Instance A & B ]# pcs --version
0.9.143

[Instance A & B ]# pacemakerd --version
Pacemaker 1.1.13-10.el7
Written by Andrew Beekhof

[Instance A & B ]# corosync -v
Corosync Cluster Engine, version '2.3.4'
Copyright (c) 2006-2009 Red Hat, Inc.

[Instance A & B ]# passwd hacluster
ユーザー hacluster のパスワードを変更。
新しいパスワード:
新しいパスワードを再入力してください:
passwd: すべての認証トークンが正しく更新できました。

[Instance A & B ]# systemctl start pcsd
[Instance A & B ]# systemctl enable pcsd
[Instance A & B ]# systemctl status pcsd

[Instance A ]# pcs cluster auth ip-10-0-0-20.ap-northeast-1.compute.internal ip-10-0-1-20.ap-northeast-1.compute.internal
Username: hacluster
Password:
ip-10-0-1-20.ap-northeast-1.compute.internal: Authorized
ip-10-0-0-20.ap-northeast-1.compute.internal: Authorized

[Instance A ]# pcs cluster setup --name aws-cluster ip-10-0-0-20.ap-northeast-1.compute.internal ip-10-0-1-20.ap-northeast-1.compute.internal --force

Shutting down pacemaker/corosync services...
Redirecting to /bin/systemctl stop  pacemaker.service
Redirecting to /bin/systemctl stop  corosync.service
Killing any remaining services...
Removing all cluster configuration files...
ip-10-0-0-20.ap-northeast-1.compute.internal: Succeeded
ip-10-0-1-20.ap-northeast-1.compute.internal: Succeeded
Synchronizing pcsd certificates on nodes ip-10-0-0-20.ap-northeast-1.compute.internal, ip-10-0-1-20.ap-northeast-1.compute.internal...
ip-10-0-0-20.ap-northeast-1.compute.internal: Success
ip-10-0-1-20.ap-northeast-1.compute.internal: Success

Restaring pcsd on the nodes in order to reload the certificates...
ip-10-0-0-20.ap-northeast-1.compute.internal: Success
ip-10-0-1-20.ap-northeast-1.compute.internal: Success

[Instance A ]# pcs cluster start --all

ip-10-0-1-20.ap-northeast-1.compute.internal: Starting Cluster...
ip-10-0-0-20.ap-northeast-1.compute.internal: Starting Cluster...

[Instance A & B ]# rpm -iUvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
[Instance A & B ]# yum -y install python-pip
[Instance A & B ]# pip --version
pip 7.1.0 from /usr/lib/python2.7/site-packages (python 2.7)

[Instance A & B ]# pip install awscli
[Instance A & B ]# aws configure
AWS Access Key ID [None]: *********************
AWS Secret Access Key [None]: **************************************
Default region name [None]: ap-northeast-1
Default output format [None]: json

[Instance A & B ]# cd /tmp
[Instance A & B ]# git clone https://github.com/moomindani/aws-eip-resource-agent.git
[Instance A & B ]# cd aws-eip-resource-agent
[Instance A & B ]# sed -i 's/\${OCF_ROOT}/\/usr\/lib\/ocf/' eip
[Instance A & B ]# mv eip /usr/lib/ocf/resource.d/heartbeat/
[Instance A & B ]# chown root:root /usr/lib/ocf/resource.d/heartbeat/eip
[Instance A & B ]# chmod 0755 /usr/lib/ocf/resource.d/heartbeat/eip

[Instance A ]# pcs property set stonith-enabled=false

[Instance A ]# pcs property set no-quorum-policy=ignore

[Instance A ]# pcs property set crmd-transition-delay="0s"

[Instance A ]# pcs resource defaults resource-stickiness="INFINITY" migration-threshold="1"

[Instance A ]# pcs resource create eip ocf:heartbeat:eip \
    params \
        elastic_ip="52.192.203.215" \
    op start   timeout="60s" interval="0s"  on-fail="stop" \
    op monitor timeout="60s" interval="10s" on-fail="restart" \
    op stop    timeout="60s" interval="0s"  on-fail="block"

[Instance A ]# pcs config

pcs config
Cluster Name: aws-cluster
Corosync Nodes:
 ip-10-0-0-20.ap-northeast-1.compute.internal ip-10-0-1-20.ap-northeast-1.compute.internal
Pacemaker Nodes:
 ip-10-0-0-20.ap-northeast-1.compute.internal ip-10-0-1-20.ap-northeast-1.compute.internal

Resources:
 Resource: eip (class=ocf provider=heartbeat type=eip)
  Attributes: elastic_ip=52.192.203.215
  Operations: start interval=0s timeout=60s on-fail=stop (eip-start-interval-0s)
              monitor interval=10s timeout=60s on-fail=restart (eip-monitor-interval-10s)
              stop interval=0s timeout=60s on-fail=block (eip-stop-interval-0s)

Stonith Devices:
Fencing Levels:

Location Constraints:
Ordering Constraints:
Colocation Constraints:

Resources Defaults:
 resource-stickiness: INFINITY
 migration-threshold: 1
Operations Defaults:
 No defaults set

Cluster Properties:
 cluster-infrastructure: corosync
 cluster-name: aws-cluster
 crmd-transition-delay: 0s
 dc-version: 1.1.13-10.el7-44eb2dd
 have-watchdog: false
 no-quorum-policy: ignore
 stonith-enabled: false

[Instance A]# systemctl stop corosync

+----------+  Ping Request   +----------+
|          | <-------------- |          |
| Server A |                 | Server B |
|          | --------------> |          |
+----------+  Ping Response  +----------+

[Server A]# iptables -A INPUT -p icmp --icmp-type 8 -s <Server B の IP Address> -j ACCEPT
[Server A]# iptables -A OUTPUT -p icmp --icmp-type 0 -s <Server B の IP Address> -j ACCEPT
[Server A]# service iptables restart

[Server B]# ping <Server A の IP Address>

PING (<Server A の IP Address>): 56 data bytes
64 bytes from (<Server A の IP Address>): icmp_seq=0 ttl=58 time=4.411 ms
64 bytes from (<Server A の IP Address>): icmp_seq=1 ttl=58 time=4.079 ms
64 bytes from (<Server A の IP Address>): icmp_seq=2 ttl=58 time=4.027 ms
^C
--- (<Server A の IP Address>) ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 4.027/4.172/4.411/0.170 ms

delist@messaging.microsoft.com

Please Remove My IP yy.yy.yy.yyy from your BlockList.

Hello ,

Thank you for your delisting request SRX1318598611ID. Your ticket was received on (Dec 21 2015 08:14 AM UTC) and will be responded to within 24 hours.

Our team will investigate the address that you have requested to be removed from our blocklist. If for any reason we are not able to remove your address, one of our technical support representatives will respond to you with additional information.

Regards,
Technical Support

こんにちは

ブラックリスト申請の削除依頼を受け取りました。24時間以内に回答します。

削除要請頂いたアドレスをについて調査します。
何らかの理由で削除依頼を引き受けられない場合は、
当社の技術サポートから追加情報をお届け致します。

以上宜しくお願い致します。
テクニカルサポート

Hello,

Thank you for contacting Microsoft Online Services Technical Support.  This email is in reference to ticket number, 1318598611 which was opened in regards to your delisting request for yy.yy.yy.yyy

The IP address you submitted has been reviewed and removed from our block lists.  Please note that there may be a 1-2 hour delay before this change propagates through our entire system.

We apologize for any inconvenience this may have caused you.  As long as our spam filtering systems do not mark a majority of email from the IP address as spam-like, your messages will be allowed to flow as normal through our network.  However, should we detect an increase in spam-like activity, the IP address may be re-added to our block list.

Should you have any further questions or concerns, please feel free to respond to this email.

Thank you again for contacting Microsoft Online Services technical support and giving us the opportunity to serve you.

こんにちは

マイクロソフト・オンライン・サービス テクニカルサポートにお問い合わせいただきありがとうございます。
このメールはチケット番号 1318598611、IPアドレス(yy.yy.yy.yyy) をブラックリストから削除する様申請頂いた件についてです。

あなたが提出されたIPアドレスを見直し、ブロックリストから削除しました。
この変更は私たちの全システムに行き届くには 1〜2時間程掛かる見込みです。

ご不便お掛けしたことをお詫び申し上げます。
スパムフィルタリングシステムがスパムとおぼしきIPアドレスからの多くのE-mailをマークしない限り
あなたのメッセージは当社のネットワークを通じて通常通りに許可されるでしょう。
しかし、スパム行為が増加していることを検知する必要があり、ブロックリストに追加する可能性があります。

その他質問や確認をご希望の際は、こちらのメールにご返信ください。

マイクロソフト・オンライン・サービス テクニカルサポートにご連絡いただき
お力添えできましたこと、誠に感謝致します。

mysql> show variables like 'max_allowed_packet';

mysql> set global max_allowed_packet = 1000000;

# mysql --help | grep my.cnf
                      order of preference, my.cnf, $MYSQL_TCP_PORT,
/etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf

[mysqld]
max_allowed_packet=10MB

mysql> show variables like 'max_allowed_packet';

+--------------------+----------+
| Variable_name      | Value    |
+--------------------+----------+
| max_allowed_packet | 10485760 |
+--------------------+----------+

PHP Fatal error:  Uncaught exception 'RedisException' with message 'Failed to AUTH connection'

# requirepass

# ps aux | grep 'redis' | grep -v 'grep'

root     12743  0.1  0.2  40604  2124 ?        Ssl  10:50   0:00 /usr/local/bin/redis-server *:6379

redis-cli> CONFIG SET REQUIREPASS ''

$ git branch -D <branch_name>

$ git reflog
$ git branch <branch_name> HEAD@{num}

$ git reflog

c95c7e9 HEAD@{0}: merge release: Merge made by the 'recursive' strategy.
ad5bed0 HEAD@{1}: checkout: moving from release to master
ffe45df HEAD@{2}: merge develop: Merge made by the 'recursive' strategy.
6aa536b HEAD@{3}: checkout: moving from develop to release

$ git branch hogehoge HEAD@{3}