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.\" -*- nroff -*-
.TH LSBLK 8 "Apr 2010" "Version 1.0"
.SH NAME
lsblk \- list block devices
.SH SYNOPSIS
.B lsblk
.RB [ options ]
.sp
.B lsblk
.RB [ options ]
.IR device...
.SH DESCRIPTION
.B lsblk
will list information about all or selected block devices. The
.B lsblk
command reads
.I sysfs
filesystem to gather information.
.PP
The command prints all block devices (except RAM disks) in the tree-like format
by default. See
.B "lsblk --help"
to get list of all available columns.
.SH OPTIONS
.IP "\fB\-a, \-\-all\fP"
List all block devices.
.IP "\fB\-b, \-\-bytes\fP"
Print the SIZE column in bytes rather than in human readable format.
.IP "\fB\-d, \-\-nodeps\fP"
Don't print device holders or slaves. For example "lsblk --nodeps /dev/sda" prints
information about the sda device only.
.IP "\fB\-e, \-\-exclude \fIlist\fP
Exclude devices by comma delimited list of major device numbers. Note that RAM
disks (major=1) are excluded by default.
.IP "\fB\-f, \-\-fs\fP
Output info about filesystems. This option is equivalent to -o NAME,FSTYPE,LABEL,MOUNTPOINT.
The authoritative information about filesystems and raids are provided by
.BR blkid (8)
command.
.IP "\fB\-h, \-\-help\fP"
Print help and exit.
.IP "\fB\-i, \-\-ascii\fP"
Use ascii characters for tree formatting.
.IP "\fB\-m, \-\-perms\fP
Output info about device owner, group and mode. This option is equivalent to -o NAME,SIZE,OWNER,GROUP,MODE.
.IP "\fB\-l, \-\-list\fP"
Use the list output format.
.IP "\fB\-n, \-\-noheadings\fP"
Do not print a header line.
.IP "\fB\-o, \-\-output \fIlist\fP"
Define output columns. Use
.B "--help"
to get list of all supported columns.
.IP "\fB\-r, \-\-raw\fP"
Use raw output format.
.IP "\fB\-t, \-\-topology\fP"
Output info about block device topology. This option is equivalent to -o NAME,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,ROTA,SCHED.
.SH AUTHORS
.nf
Milan Broz <mbroz@redhat.com>
Karel Zak <kzak@redhat.com>
.fi
.SH SEE ALSO
.BR findmnt (8),
.BR blkid (8),
.BR ls (1)
.SH AVAILABILITY
The lsblk command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
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