Results for uptime
On this page:
 
Dictionary:

uptime

  (ŭp'tīm') pronunciation
n.

The time during which a device, such as a computer, is functioning or available for use.


 
 
Computer Desktop Encyclopedia: uptime

The time during which a system is working without failure. Contrast with downtime. See availability.


 
Business Dictionary: Uptime

Time in which a machine is actually operational and a worker is occupied. For example, the computer is up. This is the opposite of Downtime, when the machine is no longer operational, usually because of the need for repairs or maintenance.

 
Hacker Slang: uptime

Technically, a machine's time since last reboot; jargonically, how long a hacker has gone without sleep. “What's your uptime?” “Oh, about 28 hours so far, but I think I can probably do another 12.” This is, of course, a reference to the uptime command and the pride with which most Unix types note how long their computers go without reboots. Uptime is a testament to the stability of the OS and the stamina of the hacker.

 
Wikipedia: uptime

Uptime is a measure of the time a computer system has been "up" and running. It came into use to describe the opposite of downtime, times when a system was not operational. The uptime and reliability of computer and communications facilities is sometimes measured in nines. "Five nines" means 99.999% availability, which translates to a total downtime of approximately five minutes and fifteen seconds per year.

Total Downtime (HH:MM:SS)
Availability per day per month per year
99.999% 00:00:00.4 00:00:26 00:05:15
99.99% 00:00:08 00:04:22 00:52:35
99.9% 00:01:26 00:43:49 08:45:56
99% 00:14:23 07:18:17 87:39:29


It is often used as a measure of computer operating system reliability and stability, in that this time represents the time a computer can be left unattended without crashing, or needing to be rebooted for administrative or maintenance purposes. Long uptime can also indicate negligence as many critical updates require reboot on some operating systems.

The uptime(1) command on Unix systems will show the current time, the uptime, the number of users and load averages for the past 1, 5 and 15 minute intervals.

$ uptime
10:52PM  up 1337 days,  7:45, 3 users, load averages: 0.21, 0.24, 0.23

The Uptime-Project, until 1st March 2007, collected data on uptimes from users, and the current record for longest uptime is 6 years, 98 days, 12 hours, 6 minutes and 44 seconds on a computer running SunOS 5.6.[1] The uptime of a personal computer is sometimes displayed as a badge of honour on an email signature or web site/forum. This was especially true in the Windows 9x days, where Windows NT and Windows 2000 users would boast of uptimes of more than 30 days, whereas many real-world Windows 9x installations crashed more often. In more recent times very long uptimes for home users with Windows NT and Windows 2000 machines are less striking because the Windows 9x line has been replaced by the Windows NT-based Windows XP.

Netcraft maintains the uptime records for many thousands of web hosting computers.

Users of Windows XP Professional and Windows Server 2003 systems can type systeminfo at the command prompt to display all system information, including the System Up Time.

Notes

  1. ^ Uptime Project - Toplist: Records (Now defunct). Retrieved on 2006-04-30.

See also

External links

Unix command line programs and builtins (more)
File and file system management cat · chattr · cd · chmod · chown · chgrp · cksum · cmp · cp · du · df · file · fsck · fuser · ln · ls · lsof · mkdir · mount · mv · pwd · rm · rmdir · split · touch
Process management at · chroot · crontab · exit · kill · killall · nice · pgrep · pidof · pkill · ps · sleep · time · top · wait · watch
User management/environment env · finger · id · logname · mesg · passwd · su · sudo · uname · uptime · w · wall · who · whoami · write
Text processing awk · comm · cut · ed · ex · fmt · head · iconv · join · less · more · paste · sed · sort · tac · tail · tr · uniq · wc · xargs
Shell programming basename · echo · expr · false · printf · test · true · unset
Printing: lp · Communications: inetd · netstat · ping · rlogin · nc · traceroute · Searching: find · grep · strings · Miscellaneous: banner · bc · cal · dd · man · size · yes

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

 
 

Join the WikiAnswers Q&A community. Post a question or answer questions about "uptime" at WikiAnswers.

 

Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.  Read more
Computer Desktop Encyclopedia. THIS COPYRIGHTED DEFINITION IS FOR PERSONAL USE ONLY.
All other reproduction is strictly prohibited without permission from the publisher.
© 1981-2008 Computer Language Company Inc.  All rights reserved.  Read more
Business Dictionary. Dictionary of Business Terms. Copyright © 2000 by Barron's Educational Series, Inc. All rights reserved.  Read more
Hacker Slang. The Jargon File. Copyright © 2007.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Uptime".  Read more

Search for answers directly from your browser with the FREE Answers.com Toolbar!  
Click here to download now. 

Get Answers your way! Check out all our free tools and products.

On this page:   E-mail   print Print  Link  

 

Keep Reading

Mentioned In:

 |  More >More >
 

Do you have the answers?