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Linux 查看磁盘使用情况

通过 DU/DF 可以查看磁盘使用情况

DU

通过搜索文件来计算每个文件的大小然后累加,du能看到的文件只是一些当前存在的,没有被删除的。他计算的大小就是当前他认为存在的所有文件大小的累加和。

用法:du [选项]... [文件]...
 或:du [选项]... --files0-from=F
Summarize disk usage of the set of FILEs, recursively for directories.

必选参数对长短选项同时适用。 -0, --null end each output line with NUL, not newline -a, --all write counts for all files, not just directories --apparent-size print apparent sizes, rather than disk usage; although the apparent size is usually smaller, it may be larger due to holes in ('sparse') files, internal fragmentation, indirect blocks, and the like -B, --block-size=SIZE scale sizes by SIZE before printing them; e.g., '-BM' prints sizes in units of 1,048,576 bytes; see SIZE format below -b, --bytes equivalent to '--apparent-size --block-size=1' -c, --total produce a grand total -D, --dereference-args dereference only symlinks that are listed on the command line -d, --max-depth=N print the total for a directory (or file, with --all) only if it is N or fewer levels below the command line argument; --max-depth=0 is the same as --summarize --files0-from=F summarize disk usage of the NUL-terminated file names specified in file F; if F is -, then read names from standard input -H equivalent to --dereference-args (-D) -h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G) --inodes list inode usage information instead of block usage -k like --block-size=1K -L, --dereference dereference all symbolic links -l, --count-links count sizes many times if hard linked -m like --block-size=1M -P, --no-dereference don't follow any symbolic links (this is the default) -S, --separate-dirs for directories do not include size of subdirectories --si like -h, but use powers of 1000 not 1024 -s, --summarize display only a total for each argument -t, --threshold=SIZE exclude entries smaller than SIZE if positive, or entries greater than SIZE if negative --time show time of the last modification of any file in the directory, or any of its subdirectories --time=WORD show time as WORD instead of modification time: atime, access, use, ctime or status --time-style=STYLE show times using STYLE, which can be: full-iso, long-iso, iso, or +FORMAT; FORMAT is interpreted like in 'date' -X, --exclude-from=FILE exclude files that match any pattern in FILE --exclude=PATTERN exclude files that match PATTERN -x, --one-file-system skip directories on different file systems --help 显示此帮助信息并退出 --version 显示版本信息并退出

所显示的数值是来自 --block-size、DU_BLOCK_SIZE、BLOCK_SIZE 及 BLOCKSIZE 环境变量中第一个可用的 SIZE 单位。 否则,默认单位是 1024 字节(或是 512,若设定 POSIXLY_CORRECT 的话)。

The SIZE argument is an integer and optional unit (example: 10K is 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> 请向<http://translationproject.org/team/zh_CN.html> 报告du 的翻译错误 Full documentation at: <http://www.gnu.org/software/coreutils/du> or available locally via: info '(coreutils) du invocation'

DF

通过文件系统来快速获取空间大小的信息,当我们删除一个文件的时候,这个文件不 是马上就在文件系统当中消失了,而是暂时消失了,当所有程序都不用时,才会根据OS的规则释放掉已 经删除的文件, df记录的是通过文件系统获取到的文件的大小,他比du强的地方就是能够看到已经删除 的文件,而且计算大小的时候,把这一部分的空间也加上了,更精确了。

用法:df [选项]... [文件]...
Show information about the file system on which each FILE resides,
or all file systems by default.

必选参数对长短选项同时适用。 -a, --all include pseudo, duplicate, inaccessible file systems -B, --block-size=SIZE scale sizes by SIZE before printing them; e.g., '-BM' prints sizes in units of 1,048,576 bytes; see SIZE format below -h, --human-readable print sizes in powers of 1024 (e.g., 1023M) -H, --si print sizes in powers of 1000 (e.g., 1.1G) -i, --inodes 显示inode 信息而非块使用量 -k 即--block-size=1K -l, --local 只显示本机的文件系统 --no-sync 取得使用量数据前不进行同步动作(默认) --output[=FIELD_LIST] use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is omitted. -P, --portability use the POSIX output format --sync invoke sync before getting usage info --total elide all entries insignificant to available space, and produce a grand total -t, --type=TYPE limit listing to file systems of type TYPE -T, --print-type print file system type -x, --exclude-type=TYPE limit listing to file systems not of type TYPE -v (ignored) --help 显示此帮助信息并退出 --version 显示版本信息并退出

所显示的数值是来自 --block-size、DF_BLOCK_SIZE、BLOCK_SIZE 及 BLOCKSIZE 环境变量中第一个可用的 SIZE 单位。 否则,默认单位是 1024 字节(或是 512,若设定 POSIXLY_CORRECT 的话)。

The SIZE argument is an integer and optional unit (example: 10K is 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).

FIELD_LIST is a comma-separated list of columns to be included. Valid field names are: 'source', 'fstype', 'itotal', 'iused', 'iavail', 'ipcent', 'size', 'used', 'avail', 'pcent', 'file' and 'target' (see info page).

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> 请向<http://translationproject.org/team/zh_CN.html> 报告df 的翻译错误 Full documentation at: <http://www.gnu.org/software/coreutils/df> or available locally via: info '(coreutils) df invocation'

本文由【呼呼南风】发布于开源中国,原文链接:https://my.oschina.net/u/1033181/blog/3136058

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