Disk Usage
df (disk filesystem) command will help us to know the disk usage in
linux. df command will display result in
the following format
Filesystem - List filesystem
1K-blocks - Total size of the file system
Used - used space
Available - available space
Use% - percentage used.
Mounted on
- mounded as
df command
syntax is as follows
df [options]
[file]
The available options for df
|
Options
|
Description
|
|
-a, --all
|
include dummy 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
|
|
--direct
|
show statistics for a file instead of mount point
produce a grand total
|
|
--total
|
|
|
-h, --human-readable
|
print sizes in human readable format (e.g., 1K 234M
2G)
|
|
-H, --si
|
likewise, but use powers of 1000 not
1024
|
|
-i, --inodes
|
list inode information instead of block usage
|
|
-k
|
like --block-size=1K
|
|
-l, --local
--no-sync
--output[=FIELD_LIST]
|
limit listing to local file systems
do not invoke sync before getting usage info
(default)
use the output format defined by FIELD_LIST or
print all fields if FIELD_LIST is omitted.
|
|
-P, --portability
--sync
|
use the POSIX output format
invoke sync before getting usage info
|
|
-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
|
|
--version
|
version information
|
|
--help
|
display
this help and exit
|
Folder usage
du Command display the amount of disk used by the specific
files or directory.
This command helps us to know the disk usage for just
directories/All files, showing grand total.
For example following command
$ du -sh /var
This will display as
the option given -s( display only total) h(human readable format) the result is as follows
17G /var
Options are follows
|
Options
|
Description
|
|
-0, --null
|
end each output line with 0 byte rather than
newline
|
|
-a, --all
--apparent-size
|
write counts for all files, not just
directories
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;
SIZE is an integer and optional unit (example: 10M
is 10*1024*1024). Units are K, M, G,
T, P, E, Z, Y (powers of 1024) or KB, MB, ... (powers of 1000)
|
|
-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
--files0-from=F
|
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
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
--inodes
|
print sizes in human readable format (e.g., 1K 234M
2G)
list inode usage information instead of block
|
|
-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
--si
|
for directories do not include size of
subdirectories
like -h, but use powers of 1000 not 1024
|
|
-s, --summarize
|
display only a total for each argument
|
|
-t, --threshold=SIZE
--time
--time=WORD
--time-style=STYLE
|
exclude entries smaller than SIZE if positive, or
entries greater than SIZE if negative
show time of the last modification of any file in
the directory, or any of its subdirectories
show time as WORD instead of modification time:
atime, access, use, ctime or status
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=PATTERN
|
exclude files that match any pattern
in FILE
exclude files that match PATTERN
|
|
-x, --one-file-system
|
skip directories on different file systems
|
|
--help
|
display this help and exit
|
|
--version
|
output version information and exit
|
