USR


Also found in: Acronyms.

USR

(1)

usr

(2)
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.
References in periodicals archive ?
Whether the commissioners engaged in unlawful de facto spot zoning when they approved the USR application for a proposed industrial use that has no relationship to agriculture in the agricultural zone.
Whether the district court erred in refusing to order the record to be supplemented with all ex parte communications between the commissioners and the applicants while the USR application was on remand before the commissioners.
The USR may not be exciting, but it is important for the following reasons:
The Honorable Eddie Ng Hak-kim, Secretary for Education of the HKSAR Government, endorsed the significance of this partnership in the Inauguration Ceremony of the USR Network held today at Hotel ICON.
Representa el porcentaje de seropositividad de las pruebas inespecificas VDRL y USR.
There is tremendous commonality between the reputation for reliable security and safety that is held by both Smith & Wesson and USR.
With just one installation file for multiple operating systems, the USR PCIe modem is designed for mass installations making it especially ideal for businesses with a high volume of varied computer systems.
USR Call Director Phone/Fax/Modem Switch Reduces Excess Telephone Lines; Provides Substantial Savings and Rapid ROI
Contract notice: Purchase, delivery of a pet insert (positron emission tomography) dedicated to the exploration of small animals and setting up on an mri biospec tsla usr 30/170 for the u1148.
1 HP Cnct Microsoft SCCM Usr SW E-LTU or equivalent (90 pieces);
Pursuant to the Acquisition Agreement, the Company has granted a back-in right to Oak Hills to acquire 10% of TransAmerican's interest in and to the Comanche well that was previously acquired by USR from Oak Hills pursuant to the USR Agreement.