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乌鲁木齐，通称乌市，旧称迪化，是中国新疆维吾尔自治区首府，国务院批复确定的中国西北地区重要的中心城市和面向中亚西亚的国际商贸中心 [1]  。截至2019年，全市下辖7个区、1个县，总面积14216.3平方千米，建成区面积436平方千米，常住人口355.2万人，城镇人口261.57万人，城镇化率74.61%。 [2] 

乌鲁木齐地处中国西北地区、新疆中部、亚欧大陆中心、天山山脉中段北麓、准噶尔盆地南缘，毗邻中亚各国，是新疆的政治、经济、文化、科教和交通中心，世界上距离海洋最远的大城市 [3]  ，有“亚心之都”的称呼，是第二座亚欧大陆桥中国西部桥头堡和中国向西开放的重要门户 [4]  ，并被列入吉尼斯世界纪录大全，是世界上最内陆、距离海洋和海岸线最远的大型城市（2500千米）。 [5] 

西汉初年，汉朝即置戊己校尉在乌鲁木齐近处的金满（吉木萨尔）设营屯田，维护丝路北道安全；唐朝时期在天山北麓设置庭州；清朝乾隆二十年（1755年）因清朝在新疆驻军开始大规模开发，乾隆二十八年（1763年）清乾隆扩建筑城，改称迪化；1884年迪化为新疆省省会，从此成为全疆的政治中心；1954年迪化改称“乌鲁木齐”，蒙古语里意为“优美的牧场”。 [4] 

乌鲁木齐还是全国文明城市、国家园林城市、全国双拥模范城市、中国优秀旅游城市、全国民族团结进步模范城市。 [4]  [6]  2018年11月，入选中国城市全面小康指数前100名 [7]  ；12月，入选2018中国大陆最佳商业城市100强。2019年12月，国家民委命名乌鲁木齐市为“全国民族团结进步示范市”。 [8] 

npm-cache

Manipulates packages cache

概要

npm cache add <tarball file>
npm cache add <folder>
npm cache add <tarball url>
npm cache add <name>@<version>

npm cache clean [<path>]
aliases: npm cache clear, npm cache rm

npm cache verify

详情

Used to add, list, or clean the npm cache folder.

• add: Add the specified package to the local cache. This command is primarily intended to be used internally by npm, but it can provide a way to add data to the local installation cache explicitly.

• clean: Delete all data out of the cache folder.

• verify: Verify the contents of the cache folder, garbage collecting any unneeded data, and verifying the integrity of the cache index and all cached data.

DETAILS

npm stores cache data in an opaque directory within the configured cache, named _cacache. This directory is a cacache-based content-addressable cache that stores all http request data as well as other package-related data. This directory is primarily accessed through pacote, the library responsible for all package fetching as of npm@5.

All data that passes through the cache is fully verified for integrity on both insertion and extraction. Cache corruption will either trigger an error, or signal to pacote that the data must be refetched, which it will do automatically. For this reason, it should never be necessary to clear the cache for any reason other than reclaiming disk space, thus why clean now requires --force to run.

There is currently no method exposed through npm to inspect or directly manage the contents of this cache. In order to access it, cacache must be used directly.

npm will not remove data by itself: the cache will grow as new packages are installed.

A NOTE ABOUT THE CACHE'S DESIGN

The npm cache is strictly a cache: it should not be relied upon as a persistent and reliable data store for package data. npm makes no guarantee that a previously-cached piece of data will be available later, and will automatically delete corrupted contents. The primary guarantee that the cache makes is that, if it does return data, that data will be exactly the data that was inserted.

To run an offline verification of existing cache contents, use npm cache verify.

Configuration

cache

Default: ~/.npm on Posix, or %AppData%/npm-cache on Windows.

The root cache folder.

请参阅

• npm-folders

• npm-config

• npm-config

• npmrc

• npm-install

• npm-publish

• npm-pack

• https://npm.im/cacache

• https://npm.im/pacote

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