sys-utils/lsns.8

   1 .\" Man page for the lsns command.
   2 .\" Copyright 2015 Karel Zak <kzak@redhat.com>
   3 .\" May be distributed under the GNU General Public License
   4
   5 .TH LSNS 8 "December 2015" "util-linux" "System Administration"
   6 .SH NAME
   7 lsns \- list namespaces
   8 .SH SYNOPSIS
   9 .B lsns
  10 [options]
  11 .RI [ namespace ]
  12
  13 .SH DESCRIPTION
  14 .B lsns
  15 lists information about all the currently accessible namespaces or about the
  16 given \fInamespace\fP.  The \fInamespace\fP identifier is an inode number.
  17
  18 The default output is subject to change.  So whenever possible, you should
  19 avoid using default outputs in your scripts.  Always explicitly define expected
  20 columns by using the \fB\-\-output\fR option together with a columns list in
  21 environments where a stable output is required.
  22
  23 \fBNSFS\fP column, printed when \fBnet\fP is specified for
  24 \fB\-\-type\fR option, is special; it uses multi-line cells.
  25 Use the option \fB\-\-nowrap\fR is for switching to "," separated single-line
  26 representation.
  27
  28 Note that \fBlsns\fR reads information directly from the /proc filesystem and
  29 for non-root users it may return incomplete information.  The current /proc
  30 filesystem may be unshared and affected by a PID namespace
  31 (see \fBunshare \-\-mount\-proc\fP for more details).
  32 .B lsns
  33 is not able to see persistent namespaces without processes where the namespace
  34 instance is held by a bind mount to /proc/\fIpid\fR/ns/\fItype\fR.
  35
  36 .SH OPTIONS
  37 .TP
  38 .BR \-J , " \-\-json"
  39 Use JSON output format.
  40 .TP
  41 .BR \-l , " \-\-list"
  42 Use list output format.
  43 .TP
  44 .BR \-n , " \-\-noheadings"
  45 Do not print a header line.
  46 .TP
  47 .BR \-o , " \-\-output " \fIlist\fP
  48 Specify which output columns to print.  Use \fB\-\-help\fR
  49 to get a list of all supported columns.
  50
  51 The default list of columns may be extended if \fIlist\fP is
  52 specified in the format \fB+\fIlist\fP (e.g. \fBlsns \-o +PATH\fP).
  53 .TP
  54 .B \-\-output\-all
  55 Output all available columns.
  56 .TP
  57 .BR \-p , " \-\-task " \fIpid\fP
  58 Display only the namespaces held by the process with this \fIpid\fR.
  59 .TP
  60 .BR \-r , " \-\-raw"
  61 Use the raw output format.
  62 .TP
  63 .BR \-t , " \-\-type " \fItype\fP
  64 Display the specified \fItype\fP of namespaces only.  The supported types are
  65 \fBmnt\fP, \fBnet\fP, \fBipc\fP, \fBuser\fP, \fBpid\fP, \fButs\fP and
  66 \fBcgroup\fP.  This option may be given more than once.
  67 .TP
  68 .BR \-u , " \-\-notruncate"
  69 Do not truncate text in columns.
  70 .TP
  71 .BR \-W , " \-\-nowrap"
  72 Do not use multi-line text in columns.
  73 .TP
  74 .BR \-V , " \-\-version"
  75 Display version information and exit.
  76 .TP
  77 .BR \-h , " \-\-help"
  78 Display help text and exit.
  79
  80 .SH AUTHORS
  81 .nf
  82 Karel Zak <kzak@redhat.com>
  83 .fi
  84
  85 .SH "SEE ALSO"
  86 .BR nsenter (1),
  87 .BR unshare (1),
  88 .BR clone (2),
  89 .BR namespaces (7)
  90
  91 .SH AVAILABILITY
  92 The lsns command is part of the util-linux package and is available from
  93 https://www.kernel.org/pub/linux/utils/util-linux/.