1PARTX(8)                     System Administration                    PARTX(8)
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NAME

6       partx  -  tell  the  kernel about the presence and numbering of on-disk
7       partitions
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SYNOPSIS

10       partx [-a|-d|-P|-r|-s|-u] [-t type] [-n M:N] [-] disk
11       partx [-a|-d|-P|-r|-s|-u] [-t type] partition [disk]
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DESCRIPTION

14       Given a device or disk-image, partx tries to parse the partition  table
15       and  list  its  contents.  It can also tell the kernel to add or remove
16       partitions from its bookkeeping.
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18       The disk argument is optional when a partition  argument  is  provided.
19       To  force  scanning a partition as if it were a whole disk (for example
20       to list nested subpartitions), use  the  argument  "-"  (hyphen-minus).
21       For example:
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23
24              partx --show - /dev/sda3
25
26       This will see sda3 as a whole-disk rather than as a partition.
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28       partx is not an fdisk program – adding and removing partitions does not
29       change the disk, it just tells the kernel about the presence  and  num‐
30       bering of on-disk partitions.
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OPTIONS

33       -a, --add
34              Add  the specified partitions, or read the disk and add all par‐
35              titions.
36
37       -b, --bytes
38              Print the SIZE column in bytes  rather  than  in  human-readable
39              format.
40
41       -d, --delete
42              Delete  the  specified  partitions or all partitions.  It is not
43              error to remove non-existing partitions, so this option is  pos‐
44              sible  to use together with large --nr ranges without care about
45              the current partitions set on the device.
46
47       -g, --noheadings
48              Do not print a header line with --show or --raw.
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50       -l, --list
51              List the partitions.  Note that all numbers are in 512-byte sec‐
52              tors.  This output format is DEPRECATED in favour of --show.  Do
53              not use it in newly written scripts.
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55       -n, --nr M:N
56              Specify the range of  partitions.   For  backward  compatibility
57              also  the  format M-N is supported.  The range may contain nega‐
58              tive numbers, for example --nr -1:-1 means the  last  partition,
59              and  --nr  -2:-1 means the last two partitions.  Supported range
60              specifications are:
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62                     M      Specifies just one partition (e.g. --nr 3).
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64                     M:     Specifies the lower limit only (e.g. --nr 2:).
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66                     :N     Specifies the upper limit only (e.g. --nr :4).
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68                     M:N    Specifies the lower and upper  limits  (e.g.  --nr
69                            2:4).
70
71       -o, --output list
72              Define  the  output columns to use for --show, --pairs and --raw
73              output.  If no output arrangement is specified, then  a  default
74              set  is  used.  Use --help to get list of all supported columns.
75              This  option  cannot  be  combined  with  the  --add,  --delete,
76              --update or --list options.
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78       --output-all
79              Output all available columns.
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81       -P, --pairs
82              List the partitions using the KEY="value" format.
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84       -r, --raw
85              List the partitions using the raw output format.
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87       -s, --show
88              List  the  partitions.   The  output columns can be selected and
89              rearranged with the --output option.  All numbers (except  SIZE)
90              are in 512-byte sectors.
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92       -t, --type type
93              Specify the partition table type.
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95       --list-types
96              List supported partition types and exit.
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98       -u, --update
99              Update the specified partitions.
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101       -S, --sector-size size
102              Overwrite default sector size.
103
104       -v, --verbose
105              Verbose mode.
106
107       -V, --version
108              Display version information and exit.
109
110       -h, --help
111              Display help text and exit.
112

EXAMPLES

114       partx --show /dev/sdb3
115       partx --show --nr 3 /dev/sdb
116       partx --show /dev/sdb3 /dev/sdb
117              All three commands list partition 3 of /dev/sdb.
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119       partx --show - /dev/sdb3
120              Lists  all  subpartitions  on  /dev/sdb3  (the device is used as
121              whole-disk).
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123       partx -o START -g --nr 5 /dev/sdb
124              Prints the start sector  of  partition  5  on  /dev/sdb  without
125              header.
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127       partx -o SECTORS,SIZE /dev/sda5 /dev/sda
128              Lists the length in sectors and human-readable size of partition
129              5 on /dev/sda.
130
131       partx --add --nr 3:5 /dev/sdd
132              Adds all  available  partitions  from  3  to  5  (inclusive)  on
133              /dev/sdd.
134
135       partx -d --nr :-1 /dev/sdd
136              Removes the last partition on /dev/sdd.
137

SEE ALSO

139       addpart(8), delpart(8), fdisk(8), parted(8), partprobe(8)
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AUTHORS

142       Davidlohr Bueso ⟨dave@gnu.org⟩
143       Karel Zak ⟨kzak@redhat.com⟩
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145       The original version was written by Andries E. Brouwer ⟨aeb@cwi.nl⟩.
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ENVIRONMENT

148       LIBBLKID_DEBUG=all
149              enables libblkid debug output.
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AVAILABILITY

152       The  partx  command  is part of the util-linux package and is available
153       from Linux Kernel Archive ⟨https://www.kernel.org/pub/linux/utils/util-
154       linux/⟩.
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158util-linux                       December 2014                        PARTX(8)