Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
時をかけるほと / Leap Second
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
Yuki Ishikawa
June 18, 2015
Technology
81
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
時をかけるほと / Leap Second
Yuki Ishikawa
June 18, 2015
More Decks by Yuki Ishikawa
See All by Yuki Ishikawa
分割40%キーボードにスムーズに入門するには
hoto17296
1
240
FastAPI の並行処理モデルを完全に理解する
hoto17296
9
3.9k
o11y 何もわからない助けてくれ
hoto17296
0
95
Snowflake Openflow さわってみた
hoto17296
0
680
第3回 Snowflake 中部ユーザ会- dbt × Snowflake ハンズオン
hoto17296
4
1.5k
ORM と向き合う
hoto17296
14
12k
明日業務で役立たない Web 開発 TIPS
hoto17296
0
270
クソ bot 実装ライブコーディング
hoto17296
0
280
DeepGBM 論文の紹介
hoto17296
0
740
Other Decks in Technology
See All in Technology
絵ではじめるKubernetesセキュリティ
aoi1
3
490
生成AIエージェントを用いた、 手動テスト手順書から自動テストへの 変換手法の検討
magicpod
0
150
20260912_スクラムにジェネラリストは必要か
ryugen04
0
400
AI 時代のスタートアップエコシステ厶から考究する技術的負債との向き合い方
m3m0r7
PRO
2
1.5k
DEFCON_CHV_CTF_Write-up.pdf
bata_24
0
150
Podは生きているのにGoだけが落ちる:GOGCとGOMEMLIMITで追うInvisible OOM Killの謎
tkc66buzz
1
710
AIネイティブプロダクトで顧客価値を最大化するプロダクトエンジニアとFDEの協働
righttouch
PRO
0
290
SQL文一行も書けない人事がCortexもろもろを使って人事業務を楽にしてみる
ponponmikankan
1
240
越境するなら専門用語を使うな高校校歌 / If you wanna cross border, you shouldn't use jargon
vtryo
0
130
事業課題から技術的負債に向き合う
sansantech
PRO
2
1.3k
Omarchy Quattro の日本語設定周り
simosako
2
180
30座EKS, 180次升級淬煉的EKS Upgrade Skill 的歷程
eric8230
0
140
Featured
See All Featured
We Are The Robots
honzajavorek
0
370
Ethics towards AI in product and experience design
skipperchong
2
370
The agentic SEO stack - context over prompts
schlessera
0
930
Into the Great Unknown - MozCon
thekraken
41
2.7k
Game over? The fight for quality and originality in the time of robots
wayneb77
1
270
Principles of Awesome APIs and How to Build Them.
keavy
128
18k
Amusing Abliteration
ianozsvald
1
300
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
230
23k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.9k
Facilitating Awesome Meetings
lara
57
7.1k
The Straight Up "How To Draw Better" Workshop
denniskardys
239
140k
Dominate Local Search Results - an insider guide to GBP, reviews, and Local SEO
greggifford
PRO
0
330
Transcript
࣌ Λ ͔ ͚ Δ ΄ ͱ
Θ ͨ ͠ Ͱ ͢
12 ճ ؍ ͨ
ࠓλΠϜϦʔϓ͢Δ ํ๏Λ͝հ͠·͢
ࠓ͢͜ͱ • ͏Δ͏ඵʹ͍ͭͯ • ͏Δ͏ඵΛײ͡Δํ๏ • λΠϜϦʔϓ͢Δํ๏
ࠓ͞ͳ͍͜ͱ • ͏Δ͏ඵʹΑΔোͷରࡦ
͏Δ͏ඵʹ͍ͭͯ
͏Δ͏ඵͱ • ੈքඪ४࣌(UTC) ͱ ੈք࣌(UT1) ͷࠩΛຒΊΔͷ • 1ඵ૿͑ͨΓݮͬͨΓ͢Δ • ࠓͷͱ͜Ζݮͬͨ͜ͱͳ͍
• 1972ʙ2012ͷؒʹܭ25ճ࣮ࢪ • ࣮ࢪͷ 6݄30 ·ͨ 12݄31 • 23࣌5960ඵ ͕Ճ͞ΕΔ • ຊ࣌ؒͩͱ࣍ͷͷ 8࣌5960ඵ
࣍ճͷ͏Δ͏ඵ • 20156݄30 23࣌5960ඵ • ຊ࣌ؒͩͱ 7݄1 23࣌5960ඵ • 2012Ҏདྷɺ̏ͿΓ
͏Δ͏ඵͱ IT • 2012࣮ࢪ࣌ʹଟ͘ͷ Linux αʔόͰ ো͕ൃੜ • ରࡦํ๏Χʔωϧͱ͔ ntpd
ͱ͔ͷ όʔδϣϯʹΑͬͯ৭ʑͳͷͰׂѪ • άάΕ (^ω^)
େखΫϥυϕϯμʔͷରԠ AWS: લޙ12࣌ؒͣͭ ܭ24͔͚࣌ؒͯௐ GCP: લޙ10࣌ؒͣͭ ܭ20͔͚࣌ؒͯௐ
AWS, GCP ʮ͏Δ͏ඵͳΜͯͳ͔ͬͨʯ ( ŋ´Ŗŋʆ)ŪƄź
͏Δ͏ඵΛײ͡Δํ๏
NTP ύέοτ
Leap Indicator • ͏Δ͏ඵ͕͍ۙ͜ͱΛΒͤΔϑϥά • ݖҖαʔόʹ LI Ϗοτ͕ઃఆ͞ΕΔͱ ঃʑʹԼҐ NTP
αʔόʹਁಁ͍ͯ͘͠ • LI ϏοτΛड͚औͬͨͱ͖Ͳ͏ରԠ͢Δ͔ ֤ NTP αʔόʹΑͬͯҟͳΔ
LI Ϗοτͷछྨ 00: ͏Δ͏ඵͳ͠ʢ௨ৗ࣌ʣ 01: ͏Δ͏ඵ͋Γʢ̍ඵ૿͢ʣ 10: ͏Δ͏ඵ͋Γʢ̍ඵݮΒ͢ʣ
LI ϏοτΛ͍ͯΈΔ $ ntpq -c rv
λΠϜϦʔϓ͢Δํ๏
લఏࣝ • ntpd Ͱ 23࣌5960ඵ ૠೖ͞Εͳ͍ • 23࣌5959ඵ ͕̎ඵ͋Δ •
ʮ60ඵʯΛѻ͑ͳ͍γεςϜ͋ΔͨΊ • ʢͱࢥΘΕΔʣ
ϛϦඵͲ͏ͳΔͷʁ ̎ճͷ 23࣌5959ඵ ʹͳͬͨΒ ϛϦඵϦηοτ͞Ε·͢
ϛϦඵͲ͏ͳΔͷʁ 23:59:59.000000 : 23:59:59.999999 23:59:59.000000 : 23:59:59.999999 00:00:00.000000 ௨ৗͷ 23࣌5959ඵ
̎ճͷ 23࣌5959ඵ ʢ͏Δ͏ඵʣ
ͭ·Γ΅ͨͪ͘ɺ ͏Δ͏ඵʹΑͬͯ ̍ඵؒͷ࣌ؒḪߦ͕ Ͱ͖Δɾɾɾͬʂʂʂ
ͬ͜ɺ͜Εɾɾɾͬʂ (;ŋ`дŋ´)
None
͍͚ͬ͑͑͑ ͑͑͑͑͑͑
None