.\" -*- 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
lists information about all or the specified block devices. The
.B lsblk
command reads the
.I sysfs
filesystem to gather information.
.PP
The command prints all block devices (except RAM disks) in a tree-like format
by default.  Use
.B "lsblk --help"
to get a 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 the devices specified by a 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 is provided by the
.BR blkid (8)
command.
.IP "\fB\-h, \-\-help\fP"
Print a help text 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"
Specify which output columns to print.  Use
.B "--help"
to get a list of all supported columns.
.IP "\fB\-r, \-\-raw\fP"
Use the 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/.