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- DU(1L) DU(1L)
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- NAME
- du - summarize disk usage
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- SYNOPSIS
- du [-abcklsxDLS] [+all] [+total] [+count-links] [+summarize]
- [+bytes] [+kilobytes] [+one-file-system] [+separate-dirs]
- [+dereference] [+dereference-args] [path...]
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- DESCRIPTION
- This manual page documents the GNU version of du. du
- displays the amount of disk space used by each argument and
- for each subdirectory of directory arguments. The space is
- measured in 1K blocks by default, unless the environment
- variable POSIX_ME_HARDER is set, in which case 512-byte
- blocks are used.
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- OPTIONS
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- -_✓a, +_✓a_✓l_✓l
- Display counts for all files, not just directories.
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- -_✓b, +_✓b_✓y_✓t_✓e_✓s
- Print sizes in bytes.
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- -_✓c, +_✓t_✓o_✓t_✓a_✓l
- Write a grand total of all of the arguments after all
- arguments have been processed. This can be used to
- find out the disk usage of a directory, with some files
- excluded.
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- -_✓k, +_✓k_✓i_✓l_✓o_✓b_✓y_✓t_✓e_✓s
- Print sizes in kilobytes. This overrides the environ-
- ment variable POSIX_ME_HARDER.
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- -_✓l, +_✓c_✓o_✓u_✓n_✓t-_✓l_✓i_✓n_✓k_✓s
- Count the size of all files, even if they have appeared
- already in another hard link.
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- -_✓s, +_✓s_✓u_✓m_✓m_✓a_✓r_✓i_✓z_✓e
- Display only a total for each argument.
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- -_✓x, +_✓o_✓n_✓e-_✓f_✓i_✓l_✓e-_✓s_✓y_✓s_✓t_✓e_✓m
- Skip directories that are on different filesystems from
- the one that the argument being processed is on.
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- -_✓D, +_✓d_✓e_✓r_✓e_✓f_✓e_✓r_✓e_✓n_✓c_✓e-_✓a_✓r_✓g_✓s
- Dereference symbolic links that are command line argu-
- ments. Does not affect other symbolic links. This is
- helpful for finding out the disk usage of directories
- like /usr/tmp where they are symbolic links.
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- -_✓L, +_✓d_✓e_✓r_✓e_✓f_✓e_✓r_✓e_✓n_✓c_✓e
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- Page 1
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- DU(1L) DU(1L)
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- Dereference symbolic links (show the disk space used by
- the file or directory that the link points to instead
- of the space used by the link).
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- -_✓S, +_✓s_✓e_✓p_✓a_✓r_✓a_✓t_✓e-_✓d_✓i_✓r_✓s
- Count the size of each directory separately, not
- including the sizes of subdirectories.
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- BUGS
- On BSD systems, du reports sizes that are half the correct
- values for files that are NFS-mounted from HP-UX systems.
- On HP-UX systems, it reports sizes that are twice the
- correct values for files that are NFS-mounted from BSD sys-
- tems. This is due to a flaw in HP-UX; it also affects the
- HP-UX du program.
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- Page 2
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