What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

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Wrote a quick tool that shows CPU usage history, per process.

Already it’s showing something strange: Time Machine backups seem to cause significant spikes for SystemUIServer, even though that process is only supposed to manage menu bar extras. Might be because I’ve hidden the TM icon using Ice?

A Mac app showing a graph with two curves. backupd shows hourly spikes, and SystemUIServer has very closely matching usage.
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A homeless person sleeps on a pavement in the centre of the city. The plan for severe cold weather has not been activated in the Ile-de-France region, where temperatures are below zero at night and range between 3C and 5C (37.4F and 41F) during the day. Paris city hall urged the French government to activate the plan without delay, highlighting the dramatic situation facing several thousand homeless people.
Photograph: Dimitar Dilkoff/AFP/Getty Images


A homeless person sleeps on a pavement in the centre of the city under a poster of Christmas globe.
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New Hampshire, US
People look up at the ice ceiling of the Ice Castles during the opening day in North Woodstock. Brent Christensen crafted his first icy creation in the front yard of his home to bring happiness and joy to his children. Since 2011, Ice Castles has been dedicated to creating a world of ice caves, frozen waterfalls and glaciers formed into archways, caverns, slides and tunnels.

Photograph: Joseph Prezioso/AFP/Getty Images



People look up at the ice ceiling of the Ice Castles.
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, , UK
Walkers on Stob na Broige peak looking to Loch Etive. Buachaille Etive Mor is one of the best known and loved of all the Munro peaks, sitting at the head of Glen Etive in the Highlands of Scotland by Glen Coe. Buachaille Etive Mòr takes the form of a ridge nearly five miles in length, almost entirely encircled by the River Etive and its tributaries.

Photograph: Murdo MacLeod/The Guardian



Walkers on Stob na Broige peak looking to Loch Etive.
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"The dispiriting conclusion is that human writing is analogous to handcrafted products and AI-generated "content" to mass-produced goods, and that the logic of capitalism will lead to the triumph of the latter. The question is whether that logic holds. In this analogy, the consumer is the reader. Are readers necessarily lapping up this "content" or is it being shoved down their throats by Big Tech?".

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Walking Europe's Last Wilderness: A Journey Through the Carpathian Mountains by Nick Thorpe, 2025

An evocative voyage through the Carpathian mountain range and its threatened landscape, peoples, and history. The Carpathian Mountains of Poland, Slovakia, Romania, and Ukraine are Europe’s last true wilderness. A landscape of great spruce and beech forests, grass meadows, and ancient villages...






Its people contend daily with the elements—as well as Europe’s last large carnivores.  But this fragile ecosystem is now under threat, from climate change and illegal logging.   Journeying from the banks of the Danube to Transylvania, Nick Thorpe guides us through the history and ecology of the watershed of Europe, between the Black Sea and the Baltic. For a thousand years the Carpathians have been a place of refuge, of identity and belonging, where powerful rulers and dynasties fought to gain control over rich gold seams and the unruly inhabitants of strategic valleys. Today, its inhabitants struggle to protect its vast forest habitat from urban sprawl as well as logging.   Drawing on interviews with shepherds, foresters and loggers, and his four decades of experience in the region, Thorpe sheds light on a neglected part of Europe—where bears, wolves, chamois, and lynxes still roam.
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The young women of today, free to study, to speak, to write, to choose their occupation, should remember that every inch of this freedom was bought for them at a great price. It is for them to show their gratitude by helping onward the reforms of their own times, by spreading the light of freedom and of truth still wider. The debt that each generation owes to the past it must pay to the future.

—Abigail Scott Duniway



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Writer, Sailor, Soldier, Spy: Ernest Hemingway's Secret Adventures, 1935-1961 by Nicholas E. Reynolds, 2017

A riveting international cloak-and-dagger epic ranging from the Spanish Civil War to the liberation of Western Europe, wartime China, the Red Scare of Cold War America, and the Cuban Revolution, Writer, Sailor, Soldier, Spy reveals for the first time Ernest Hemingway’s secret adventures in espionage and intelligence during the 1930s and 1940s




(including his role as a Soviet agent codenamed "Argo"), a hidden chapter that fueled both his art and his undoing. 
While he was the historian at the esteemed CIA Museum, Nicholas Reynolds, a longtime American intelligence officer, former U.S. Marine colonel, and Oxford-trained historian, began to uncover clues suggesting Nobel Prize-winning novelist Ernest Hemingway was deeply involved in mid-twentieth-century spycraft -- a mysterious and shocking relationship that was far more complex, sustained, and fraught with risks than has ever been previously supposed. Now Reynolds's meticulously researched and captivating narrative "looks among the shadows and finds a Hemingway not seen before" ( London Review of Books ), revealing for the first time the whole story of this hidden side of Hemingway's life: his troubling recruitment by Soviet spies to work with the NKVD, the forerunner to the KGB, followed in short order by a complex set of secret relationships with American agencies. 
Starting with Hemingway's sympathy to antifascist forces during the 1930s, Reynolds illuminates Hemingway's immersion in the life-and-death world of the revolutionary left, from his passionate commitment to the Spanish Republic; his successful pursuit by Soviet NKVD agents, who valued Hemingway's influence, access, and mobility; his wartime meeting in East Asia with communist leader Chou En-Lai, the future premier of the People's Republic of China;
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