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lssu - Online in the Cloud

Run lssu in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command lssu that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


lssu - list usage state of NILFS2 segments

SYNOPSIS


lssu [options] [device]

DESCRIPTION


lssu is a utility for displaying usage state of NILFS2 segments in device, where a segment
is contiguous lump of disk blocks and an allocation unit of NILFS2 disk space. When
device is omitted, /proc/mounts is examined to find a NILFS2 file system.

This command will fail if the device has no active mounts of a NILFS2 file system.

OPTIONS


-a, --all
Do not hide clean segments.

-h, --help
Display help message and exit.

-i index, --index=index
Skip index segments at start of input.

-l, --latest-usage
Print usage status of the moment.

-n lines, --lines=lines
List only lines input segments.

-p period, --protection-period=period
Specify protection period. This option is used when printing usage status of the
moment (with -l option) to test if each block in segments is protected and is not
reclaimable. Optionally, the period parameter may be suffixed by one of the
following units designators: ´s´, ´m´, ´h´, ´d´,´w´,´M´, or ´Y´, for seconds,
minutes, hours, days, weeks, months, or years, respectively.

-V, --version
Display version and exit.

FIELD DESCRIPTION


Every line of the lssu output consists of the following fields:

SEGNUM Segment number.

DATE Creation date.

TIME Creation time.

STAT State of the segment. It consists of the following flags:

a The segment is active, meaning that it is recently created and cannot be
reclaimed by the garbage collector.

d The segment is dirty, meaning that it is in use.

e The segment is erroneous, meaning that it has once caused an I/O error.
NILFS2 avoids allocating the segments with this flag.

p (optional)
The segment is protected, meaning that garbage collection for the segment is
prevented for some reason, for instance, the protection period is not
elapsed from its last modified time, the segment is pinned by the file
system, or it is erroneous and unreclaimable, etc. This flag is displayed
when -l option is specified.

NBLOCKS
Number of in-use blocks of the segment.

NLIVEBLOCKS (optional)
Number and ratio of in-use blocks of the moment. This field is displayed when -l
option is specified.

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