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Manual Pages  — JLS

NAME

jls – list jails

CONTENTS

SYNOPSIS


jls [--libxo] [-dhNnqsv] [-j jail] [parameter ...]

DESCRIPTION

The jls utility lists all active jails, or the specified jail. Each jail is represented by one row which contains space-separated values of the listed parameters, including the pseudo-parameter all which will show all available jail parameters. A list of available parameters can be retrieved via "sysctl". See jail(8) for a description of some core parameters.

If no parameters or any of the options -hns are given, the following four columns will be printed: jail identifier (jid), IP address (ip4.addr), hostname (host.hostname), and path (path).

The following options are available:
--libxo
  Generate output via libxo(3) in a selection of different human and machine readable formats. See xo_parse_args(3) for details on command line arguments.
-d
  List dying as well as active jails.
-h
  Print a header line containing the parameters listed. If no parameters are given on the command line, all is assumed.
-N
  In the standard display mode, print each jail's name instead of its numeric ID. If the jail does not have a name, the numeric ID is printed instead.
-n
  Print parameters in "name=value" format, where each parameter is preceded by its name. If no parameters are given on the command line, all is assumed.
-q
  Put quotes around parameters if they contain spaces or quotes, or are the empty string.
-s
  Print parameters suitable for passing to jail(8), skipping read-only and unused parameters. Implies -nq.
-v
  Extend the standard display with a multiple-line summary per jail, containing the following parameters: jail identifier (jid), hostname (host.hostname), path (path), jail name (name), jail state (dying), cpuset ID (cpuset), IP address(es) (ip4.addr and ip6.addr).
-j jail
  The jid or name of the jail to list. Without this option, all active jails will be listed.

SEE ALSO

jail_get(2), libxo(3), xo_parse_args(3), jail(8), jexec(8)

HISTORY

The jls utility was added in FreeBSD 5.1 . Extensible jail parameters were introduced in FreeBSD 8.0 . libxo support was added in FreeBSD 11.0 .

JLS (8) July 20, 2012

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Please direct any comments about this manual page service to Ben Bullock.

This philosophy, in the hands of amateurs, leads to inexplicably mind-numbing botches like the existence of two programs, “head” and “tail,” which print the first part or the last part of a file, depending. Even though their operations are duals of one another, “head” and “tail” are different programs, written by different authors, and take different options!
— The Unix Haters' handbook