なにかとLinuxサーバで調査する機会が多いため、便利なコマンド例を記載
〇duコマンド
ディスク使用量を表示するためのコマンドであり、監視アラートを検知した場合どの領域で閾値を超えたかを確認するために個人的に使用しています。
du -Sh <調査領域> |sort -hr |head -10上位10位の使用量を求めだしたものです。
du
-S : サブディレクトリを再帰的に計算せず、指定されたディレクトリ自体のサイズのみを表示
-h : KB、MB、GBなどの単位での表示
sort
-h : KB、MB、GBなどの単位での表示
-r : 降順
du --exclude=<調査除外領域> -Sh <調査領域>NASなどのマウント領域まで読み込んでしまうときは、excludeオプションで除外
〇findコマンド
ファイルやディレクトリを検索するためのコマンドであり、個人的にはShellでの使用や不要なログなどの調査としても使用している。
find <調査領域> -type f -name "*.txt"
-type f : 検索対象がファイル。ここが-type dであればディレクトリが検索対象
-name : どんな名前かどうか
find <調査領域> -type f -mtime -7
Shellでよく使用しているコマンドの一種。
直近何日以内に更新されたかどうかを検索するコマンド。
-mtime -7 : 現在から７日以内
find <調査領域> -type f -size +100M
100MB以上のファイルを抽出して検索したいときのコマンド。
-size : KB、MB、GBなどの単位で合わせられる
コメント
# Harvard University: A Legacy of Excellence and Innovation
## A Brief History of Harvard University
Founded in 1636, **Harvard University** is the oldest and one of the
most prestigious higher education institutions in the United States.
Located in Cambridge, Massachusetts, Harvard has built a global reputation for academic
excellence, groundbreaking research, and influential alumni.
From its humble beginnings as a small college established
to educate clergy, it has evolved into a world-leading university that shapes the future across various
disciplines.
## Harvard’s Impact on Education and Research
Harvard is synonymous with **innovation and intellectual leadership**.
The university boasts:
– **12 degree-granting schools**, including the renowned **Harvard Business School**,
**Harvard Law School**, and **Harvard Medical School**.
– **A faculty of world-class scholars**, many of whom are Nobel laureates, Pulitzer
Prize winners, and pioneers in their fields.
– **Cutting-edge research**, with Harvard leading initiatives in artificial intelligence,
public health, climate change, and more.
Harvard’s contribution to research is immense, with billions of dollars
allocated to scientific discoveries and technological advancements each year.
## Notable Alumni: The Leaders of Today and Tomorrow
Harvard has produced some of the **most influential figures**
in history, spanning politics, business, entertainment, and science.
Among them are:
– **Barack Obama & John F. Kennedy** – Former U.S.
Presidents
– **Mark Zuckerberg & Bill Gates** – Tech visionaries
(though Gates did not graduate)
– **Natalie Portman & Matt Damon** – Hollywood icons
– **Malala Yousafzai** – Nobel Prize-winning activist
The university continues to cultivate future leaders who shape industries and drive global
progress.
## Harvard’s Stunning Campus and Iconic Library
Harvard’s campus is a blend of **historical charm and modern innovation**.
With over **200 buildings**, it features:
– The **Harvard Yard**, home to the iconic **John Harvard Statue** (and the famous “three lies” legend).
– The **Widener Library**, one of the largest university libraries in the world, housing **over 20 million volumes**.
– State-of-the-art research centers, museums, and performing arts venues.
## Harvard Traditions and Student Life
Harvard offers a **rich student experience**,
blending academics with vibrant traditions, including:
– **Housing system:** Students live in one of 12 residential houses, fostering
a strong sense of community.
– **Annual Primal Scream:** A unique tradition where students de-stress by running through Harvard Yard before
finals!
– **The Harvard-Yale Game:** A historic football rivalry that unites alumni and students.
With over **450 student organizations**, Harvard students engage in a
diverse range of extracurricular activities, from entrepreneurship to performing arts.
## Harvard’s Global Influence
Beyond academics, Harvard drives change in **global policy, economics, and technology**.
The university’s research impacts healthcare, sustainability, and artificial intelligence, with
partnerships across industries worldwide. **Harvard’s endowment**,
the largest of any university, allows it to fund scholarships, research, and public initiatives,
ensuring a legacy of impact for generations.
## Conclusion
Harvard University is more than just a school—it’s a **symbol
of excellence, innovation, and leadership**.
Its **centuries-old traditions, groundbreaking discoveries, and transformative education** make it one of the most influential institutions in the world.
Whether through its distinguished alumni, pioneering research, or vibrant student life,
Harvard continues to shape the future in profound ways.
Would you like to join the ranks of Harvard’s legendary scholars?
The journey starts with a dream—and an application!
https://www.harvard.edu/