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[root@ns1 opt]# du -h -s /* | sort
12K /mnt
13M /sbin
16K /lost+found
1.8G /usr
194M /root
22G /opt
24K /tmp
4.0K /initrd
4.0K /misc
424K /dev
4.5M /boot
4.9M /bin
61M /var
8.0K /home
81M /lib
903M /proc
9.1M /etc
-------------
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du -m | cut -d "/" -f 2 //¿´µÚ¶þ¸ö/ ×Ö·ûÇ°µÄÎÄ×Ö
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-a, --all write counts for all files, not just directories
-B, --block-size=SIZE use SIZE-byte blocks
-b, --bytes print size in bytes
-c, --total produce a grand total
-D, --dereference-args dereference FILEs that are symbolic links
-h, --human-readable ÒÔÈÝÒ×Àí½âµÄ¸ñʽӡ³öÎļþ´óС (ÀýÈç 1K 234M 2G)
-H, --si ÀàËÆ -h£¬µ«È¡ 1000 µÄ´Î·½¶ø²»ÊÇ 1024
-k ¼´ --block-size=1K
-l, --count-links Á¬Ó²Á´½ÓµÄ´óСҲ¼ÆËãÔÚÄÚ
-L, --dereference ÕÒ³öÈκηûºÅÁ´½ÓָʾµÄÕæÕýÄ¿µÄµØ
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-x, --one-file-system skip directories on different filesystems
-X FILE, --exclude-from=FILE Exclude files that match any pattern in FILE.
--exclude=PATTERN Exclude files that match PATTERN.
--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 sa
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