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시스템 체크 # 시스템 부하[root@master ~]# uptime 10:59:44 up 243 days, 21:23, 1 user, load average: 1.03, 3.11, 4.14 평균 부하(load average)의 다음에 나오는 세 개의 숫자(1.03, 3.11, 4.14)는 시스템에서의 1분, 5분, 15분 동안의 평균 부하를 각각 나타낸다.시스템의 평균 부하는 실행 가능한 상태 혹은 중단 불가능한 상태의 프로세스들의 평균 개수와 같다.실행 가능한 프로세스는 현재 CPU를 사용하고 있거나 CPU 사용을 위해 대기 중인 상태이고, 중단 불가능한 프로세스는 I/O를 기다리고 있는 프로세스다. 단일 CPU 환경의 시스템에서 평균 부하 1의 의미는 한 개의 CPU가 끊임없이 일을 하고 있다는 뜻이다. # t.. 더보기
How Can a File’s Size be Zero? We all occasionally run across a ‘situation’ on our computers that leaves us completely baffled, such as a file that has a size of zero, but how is that even possible? Today’s SuperUser Q&A post has the answers to a confused reader’s question.Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites.The Quest.. 더보기
How to Create ISO Files From Discs on Windows, Mac, and Linux ISO files are disc images — complete images of a CD or DVD bundled in a single file. This file can then be “mounted” and made available as a virtual CD or DVD, allowing you to convert physical discs to virtual ones.This is particularly useful if you want to use old game or software discs on a modern computer that doesn’t have a disc drive. Note that some DRM copy protection schemes won’t work wi.. 더보기
7 Ways To Free Up Hard Disk Space On Windows Hard drives are getting larger and larger, but somehow they always seem to fill up. This is even more true if you’re using a solid-state drive (SSD), which offers much less hard drive space than traditional mechanical hard drives.If you’re hurting for hard drive space, these tricks should help you free up space for important files and programs by removing the unimportant junk cluttering up your .. 더보기

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