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  24 .TH "JINFO" "1" "2018" "JDK 13" "JDK Commands"
  25 .hy
  26 .SH NAME
  27 .PP
  28 jinfo \- generate Java configuration information for a specified Java
  29 process
  30 .SH SYNOPSIS
  31 .PP
  32 \f[B]Note:\f[R] This command is experimental\ and unsupported.
  33 .PP
  34 \f[CB]jinfo\f[R] [\f[I]option\f[R]] \f[I]pid\f[R]
  35 .TP
  36 .B \f[I]option\f[R]
  37 This represents the \f[CB]jinfo\f[R] command\-line options.
  38 See \f[B]Options for the jinfo Command\f[R].
  39 .RS
  40 .RE
  41 .TP
  42 .B \f[I]pid\f[R]
  43 The process ID for which the configuration information is to be printed.
  44 The process must be a Java process.
  45 To get a list of Java processes running on a machine, use either the
  46 \f[CB]ps\f[R] command or, if the JVM processes are not running in a
  47 separate docker instance, the \f[B]jps\f[R] command.
  48 .RS
  49 .PP
  50 \f[B]Note:\f[R] JDK 10 has added support for using the Attach API when
  51 attaching to Java processes running in a separate docker process.
  52 However, the \f[CB]jps\f[R] command will not list the JVM processes that
  53 are running in a separate docker instance.
  54 If you are trying to connect a Linux host with a Virtual Machine that is
  55 in a docker container, you must use tools such as \f[CB]ps\f[R] to look up
  56 the PID of the JVM.
  57 .RE
  58 .SH DESCRIPTION
  59 .PP
  60 The \f[CB]jinfo\f[R] command prints Java configuration information for a
  61 specified Java process.
  62 The configuration information includes Java system properties and JVM
  63 command\-line flags.
  64 If the specified process is running on a 64\-bit JVM, then you might
  65 need to specify the \f[CB]\-J\-d64\f[R] option, for example:
  66 .RS
  67 .PP
  68 \f[CB]jinfo\ \-J\-d64\ \-sysprops\f[R] \f[I]pid\f[R]
  69 .RE
  70 .PP
  71 This command is unsupported and might not be available in future
  72 releases of the JDK.
  73 In Windows Systems where \f[CB]dbgeng.dll\f[R] is not present, the
  74 Debugging Tools for Windows must be installed to have these tools work.
  75 The \f[CB]PATH\f[R] environment variable should contain the location of
  76 the \f[CB]jvm.dll\f[R] that\[aq]s used by the target process or the
  77 location from which the core dump file was produced.
  78 .SH OPTIONS FOR THE JINFO COMMAND
  79 .PP
  80 \f[B]Note:\f[R]
  81 .PP
  82 If none of the following options are used, both the command\-line flags
  83 and the system property name\-value pairs are printed.
  84 .TP
  85 .B \f[CB]\-flag\f[R] \f[I]name\f[R]
  86 Prints the name and value of the specified command\-line flag.
  87 .RS
  88 .RE
  89 .TP
  90 .B \f[CB]\-flag\f[R] [\f[CB]+\f[R]|\f[CB]\-\f[R]]\f[I]name\f[R]
  91 Enables or disables the specified Boolean command\-line flag.
  92 .RS
  93 .RE
  94 .TP
  95 .B \f[CB]\-flag\f[R] \f[I]name\f[R]\f[CB]=\f[R]\f[I]value\f[R]
  96 Sets the specified command\-line flag to the specified value.
  97 .RS
  98 .RE
  99 .TP
 100 .B \f[CB]\-flags\f[R]
 101 Prints command\-line flags passed to the JVM.
 102 .RS
 103 .RE
 104 .TP
 105 .B \f[CB]\-sysprops\f[R]
 106 Prints Java system properties as name\-value pairs.
 107 .RS
 108 .RE
 109 .TP
 110 .B \f[CB]\-h\f[R] or \f[CB]\-help\f[R]
 111 Prints a help message.
 112 .RS
 113 .RE