How to fix: Refused to display https://www.youtube.com/watch?v=xxx in a frame because it set X-Frame-Options to SAMEORIGIN.

Putting a YouTube watch URL straight into an iframe src triggers an X-Frame-Options error — swap it for the embed URL.

[MongoDB] How to rename/change database names

Rename a MongoDB database by copyDatabase to the new name, then dropDatabase the old one.

Data matching latitude/longitude with Japanese addresses can be obtained free from MLIT's 'Location Reference Information Download Service'

Japan's MLIT offers free lat/lng to address data via its Location Reference Information Download Service.

Story of registering for Sakura VPS's 2-week free trial period to set up with Ansible

Signed up for Sakura VPS's 2-week free trial to prepare for Ansible-based server setup.

When 'Updating RPMS on system' appears on console during Sakura VPS first boot, wait patiently

If Sakura VPS first boot is stuck on `Updating RPMS on system`, wait about 20 minutes.

Use the -c option to exclude invalid characters that iconv cannot convert

Use iconv's -c option to skip invalid characters and finish a UTF-8 to Shift JIS conversion.

[Google Spreadsheet] To convert numbers to Plain Text, use the TEXT(A1,"@") function

When VLOOKUP fails unexpectedly, TEXT(A1,"@") to convert the key to plain text solved it.

mesh.js - extending MongoDB shell to use moment.js, underscore.js and other useful libraries

Extending the MongoDB shell with mesh.js so moment.js and underscore.js are available, with a date-arithmetic example.

Won't mentoring systems produce good results unless the person recognizes 'there's a need for a mentoring system'?

A note on why mentoring systems tend to work only when the mentee themselves recognizes the need for one.

[Shell Script] Getting formatted dates for yesterday, today, and tomorrow

Using `date -d '1 days ago'` and friends to get yesterday, today, and tomorrow formatted as `YYYY-MM-DD`.

[SEO] Should I use half-width spaces or  ?

A short Q&A memo on whether to use half-width spaces or   from an SEO perspective.

Even for IT companies, phone calls are still the emergency communication method

Even at an IT company, phone calls are still the emergency channel — configuring iPhone Do Not Disturb around it.

Notation for mention posts like @channel from Slack bot

Use the <!channel> notation to make @channel mentions notify when posting from a Slack bot.

[SEO] Improving mobile-friendliness apparently affects increasing domain authority

Mobile-friendliness feeds domain authority — sharing my Mobile-Friendly Test results for this site.

[Mac] How to fix slow Excel performance

Fixing slow Excel for Mac by cleaning up font duplicates, preference plists, and Microsoft caches.

Can Google Search Console switch search results by co.jp or .com? #SEO

A short Q&A on whether Google Search Console can switch results between co.jp and .com.

Report from 'UZABASE Meetup#3 ~Improving Team Productivity~' #UzabaseMeetup

A participant report from UZABASE Meetup#3 on improving team productivity.

After upgrading to Mac OS X El Capitan, hub command stopped working, but 'brew upgrade hub' fixed it

The hub command broke with ArgumentError after upgrading to El Capitan, and 'brew upgrade hub' fixed it.

When copying and pasting MongoDB query results with tab-delimited strings, tab characters may disappear, so file output is best

Tab characters can disappear when pasting Mongo query output from Terminal — writing to a file and importing fixes it.

Report from 'Shibuya EC Meetup vol.2' #pbtech

A participation report from Pepabo's 'Shibuya EC Meetup vol.2' — LT sessions, a theater performance, and social hour.

[Ansible] Using the -k, --ask-pass option with ansible-playbook command causes errors for servers that can SSH without password

Passing ansible-playbook -k, --ask-pass to a key-authenticated SSH host triggers an authentication error — dropping the flag fixes it.

Lesson learned: Check router's DHCP allocation limit when you get 'Cannot connect to internet due to self-assigned IP address' error

The lesson: when Wi-Fi hits a self-assigned IP error, check the router's DHCP allocation limit — mine was capped at 32.

[Windows10] L2TP/IPSec VPN client connection setup

Reference notes for L2TP/IPSec VPN client setup on Windows 10, including a Mac VPN Server tweak.

[WordPress] How to configure All in One SEO Pack to display Facebook og:image nicely

Setting All in One SEO Pack's OG:Image Source to First Attached Image so Facebook picks up the right og:image.

Business books recommended by a fashion e-commerce startup CEO

Business book picks on leadership and transformation, recommended by a fashion e-commerce startup CEO.

Slack Multi-Channel / Single-Channel Guest account pricing

How Slack's Multi-Channel and Single-Channel Guest pricing works and when to use each.

Authentication protocol 'MS-CHAP v2' used for VPN connections

MS-CHAP v2 for PPTP VPNs and its vulnerability, plus mitigations like PEAP pairing or L2TP/IPSec.

Purchased 'WEB+DB PRESS Complete Edition' as training material for new engineers

Purchasing the WEB+DB PRESS Complete Edition as source material for new-engineer training.

Book 'PR Work Techniques' recommended by a PR person at a certain IT company

A short note on 'PR Work Techniques,' a book recommended by an IT-company PR practitioner.

Compatible alternative power cable for Acer Aspire R7

Looking up an Amazon-sold 19V 3.42A 65W replacement AC adapter for a colleague's Acer Aspire R7.

Let's run cycles of task management, sharing, and improvement as a team ~ Trello + Toggl use case

Three steps for team-wide improvement cycles: visualize tasks with Trello, measure time with Toggl, then optimize what actually takes the longest.

Documentation has maintenance costs, so it's OK for now if we just know 'who the expert is' within the company

Transactive Memory — knowing 'who knows what' inside an organization matters more than everyone memorizing the same thing.

AirMac Extreme doesn't have built-in VPN server functionality

AirMac Extreme lacks a built-in VPN server, so use VPN passthrough with a LAN-side VPN server instead.

NURO Biz ONU doesn't have router functionality

A note that NURO Biz's ONU (Huawei-EchoLife HG8040H) has no router functionality, unlike NTT's.

How to initialize (reset) AirMac Extreme

The reset button location on AirMac Extreme, plus the soft reset and factory default reset procedures.

Steps to quickly install Elasticsearch on Mac with Homebrew

Install Java and Elasticsearch via Homebrew, start the service, and add the elasticsearch-head plugin.

How to install Ansible 2 on Mac

A quick note on installing the Ansible 2.x series on macOS with Homebrew.

How to fix 'fatal: cannot create directory at '.github': Permission denied' error with brew update

How to fix brew update's Permission denied error by chown-ing /usr/local and resetting the Homebrew repo.

[Node.js] npm package executable files exist as symbolic links in node_modules/.bin

How npm-installed executables end up as symlinks under node_modules/.bin, with a real directory listing.

What I want you to do if you're aiming to be a supportive type of leader

A prioritized to-do list for supportive-style leaders — hand off work, catch up on the team, join meetings, own cross-team coordination.

Linking Google Analytics and AdSense

Linking Google Analytics and AdSense to analyze the relationship between sessions, PV/UU, and AdSense revenue.

[Google Analytics] How to resolve 'A security issue has occurred. Please reload the page. Unable to verify your account credentials. Please check your account information and log in again.'

Resolving the 'security issue' error in Google Analytics caused by the authuser URL parameter.

Comparing online storage services for backup purposes

Comparing Google Drive, Dropbox, OneDrive, MEGA, S3, and Backblaze B2 for personal backup on price and usability.

[Gmail] Setting and using multiple stars other than the default star

Enabling Gmail's multiple stars and narrowing them down to a small set that stays manageable in daily use.

E-commerce sites can expect SEO benefits by displaying reviews on product pages

Notes on why showing many product reviews helps SEO, with a look at how Amazon.co.jp lays out customer reviews.

Use printjson() to output Objects in MongoDB shell

Use printjson() instead of print() to inspect Object values inside the MongoDB shell.

Engineers aren't wizards who can do everything

Engineering roles are highly specialized — a note on setting realistic expectations across them.

Set WordPress author name to be hidden

Hiding the WordPress author name on single-author sites via a theme option.

[Linux] For deleting tab characters and spaces, tr command with -d option is simple and recommended

Use tr -d to strip tabs and spaces on Linux or macOS, plus a quick reference for tr's main options.

Proposals from people without track records are like entrepreneurs with ideas but no execution ability

An email excerpt on why cross-team proposals need a track record and completed personal work behind them.