du df df和du的区别.docVIP

du df df和du的区别 导读：就爱阅读网友为您分享以下“df和du的区别”资讯，希望对您有所帮助，感谢您对92的支持! Document Id: 26928Synopsis: du and df Differences (originally published 8/91) Update date: 2001-05-13Description: du and df Differences -- -- This article explains how reporting disk usage du and reporting free disk space on file systems df may show different numbers. du -- The du user command gives the number of kilobytes contained in all files and, recursively, directories within each specified directory or file (filename). If filename is missing, `.’ (the current directory) is used. A file which has multiple links to it is only counted once. EXAMPLE: system % du 5 ./jokes 33 ./squash 44 ./tech.papers/lpr.document 217 ./tech.papers/new.manager 401 ./tech.papers 144 ./memos 80 ./letters 388 ./window 93 ./messages 15 ./useful.news 1211 . Note that the last number, 1211 is the grand total (in kilobytes) for the directory. df -- The df user command displays the following information: amount of disk space occupied by currently mounted file systems the amount of used and available space how much of the file system’s total capacity has been used Used without arguments, df reports on all mounted file systems. EXAMPLE: system % df Filesystem kbytes used avail capacity Mounted on /dev/ip0a 7445 4714 1986 70% / /dev/ip0g 42277 35291 2758 93% /usr Note: used plus avail is less than the amount of space in the file system (kilobytes) because the system reserves a fraction of the space in the file system to allow its allocation routines to work well. The amount reserved is typically about 10%. (This may be adjusted using the tunefs command. Refer to the man pages on tunefs( for more information.) When all the space on a file system, except for this reserve, is in use, only the super-user can allocate new files and data blocks to existing files. This, however, may cause the file system to be over allocated. When a file system is over