$ man du
NAME
du - estimate file space usage
SYNOPSIS
du [OPTION]... [FILE]...
du [OPTION]... --files0-from=F
DESCRIPTION
Summarize disk usage of each FILE, recursively for directories.
Mandatory arguments to long options are mandatory for short options too.
-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 fragmenta-
tion, indirect blocks, and the like
-B, --block-size=SIZE use SIZE-byte blocks
-b, --bytes
equivalent to '--apparent-size --block-size=1'
-c, --total
produce a grand total
-D, --dereference-args
dereference FILEs that are symbolic links
--files0-from=F
summarize disk usage of the NUL-terminated file names specified in file F
-H like --si, but also evokes a warning; will soon change to be equivalent to --dereference-args (-D)
-h, --human-readable
print sizes in human readable format (e.g., 1K 234M 2G)
--si like -h, but use powers of 1000 not 1024
-k like --block-size=1K
-l, --count-links
count sizes many times if hard linked
-m like --block-size=1M
-L, --dereference
如果想以G为单位显示当前文件夹下的文件及文件夹大小：
$ du -a -B g . (或者 du -sh .)
2G ./SRR057636_2.fastq
5G ./SRR057631.fastq.sam
3G ./SRR057638_1.fastq
3G ./SRR057638_2.fastq
3G ./SRR057639_1.fastq
3G ./SRR057639_2.fastq
3G ./SRR057640_1.fastq
3G ./SRR057640_2.fastq
3G ./SRR057641_1.fastq
3G ./SRR057641_2.fastq
3G ./SRR057642_1.fastq
3G ./SRR057642_2.fastq
4G ./SRR057643_2.fastq
3G ./SRR057644_2.fastq
3G ./SRR057645_2.fastq
3G ./SRR057646_2.fastq
2G ./SRR057647_2.fastq
2G ./SRR057629.fastq.sam
1G ./SRR057632.fastq.sam
128G .