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USR    
User. The "/usr" directory hierarchy on {Unix} systems. Once
upon a time, in the early days of Unix, this area actually
held users' home directories and files. Since these tend to
expand much faster than system files, /usr would be mounted on
the biggest disk on the system. The root directory, "/" in
contrast, contains only what is needed to {boot} the {kernel},
after which /usr and other disks could be mounted as part of
the multi-user start-up process.

/usr has been used as the "everything else" area, with many
"system" files such as compiler libraries (/usr/include,
/usr/lib), utilty programs (/usr/bin, /usr/ucb), games
(/usr/games), local additions (/usr/local), manuals
(/usr/man), temporary files and queues for various {daemons}
(/usr/spool). These optional extras have grown in size as
Unix has evolved and disks have dropped in price. Under later
versions of {SunOS}, the user files have fled /usr altogether
for a new "/home" {partition} and temporary files have moved
to "/var". This allows /usr to be mounted read-only with some
gain in security and performance since access times are not
updated for files on read-only file systems.


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英文字典中文字典相关资料:


  • Connectivity hardware for applications | USR
    USR is a leading provider of global connectivity hardware, trusted by millions of businesses and consumers for over 4 decades
  • USR international contacts
    USR is a leading provider of global connectivity hardware, trusted by millions of businesses and consumers for over 4 decades
  • Backgrounder - USR
    USR's efforts are concentrated on the emerging home connectivity market and small enterprise networking solutions targeted at the home, home office, and small- to medium-business markets
  • Courier® business products | USR
    USR® was one of the first companies to offer high-speed dial-up modems The Courier® modem brand, first introduced in 1983, was just one of the company’s many products designed to connect people to the Internet and each other
  • USR search
    Struggling to find a particular web page or piece of content? Use the USR search to hone in on the information that you need
  • Privacy Statement - USR
    USR is strongly committed to protecting personal data This privacy statement explains what personal data we collect and how the company uses it
  • Product registration form - USR
    USR is a leading provider of global connectivity hardware, trusted by millions of businesses and consumers for over 4 decades
  • Regulatory compliance and export control - USR
    USR supports the Electronic Industry Citizenship Coalition (“EICC”) and the Global e-sustainability Initiative ("GeSI") Conflict-Free Smelter Program
  • Cellular M2M modems, gateways, and solutions - USR
    USR® cellular modems and gateways include the features and reliable connections you need for doing highly secure business transactions including point of sale (POS), vending, out of band (OOB), data capture, remote management and fleet management Choose between 3G and 4G Cat 1 products to fit most M2M and IoT applications
  • USR5630G product support downloads - usr. com
    USR is a leading provider of global connectivity hardware, trusted by millions of businesses and consumers for over 4 decades





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