1 .\" Copyright (c) 1994, 2019, Oracle and/or its affiliates. All rights reserved. 2 .\" DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 .\" 4 .\" This code is free software; you can redistribute it and/or modify it 5 .\" under the terms of the GNU General Public License version 2 only, as 6 .\" published by the Free Software Foundation. 7 .\" 8 .\" This code is distributed in the hope that it will be useful, but WITHOUT 9 .\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 .\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 .\" version 2 for more details (a copy is included in the LICENSE file that 12 .\" accompanied this code). 13 .\" 14 .\" You should have received a copy of the GNU General Public License version 15 .\" 2 along with this work; if not, write to the Free Software Foundation, 16 .\" Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 .\" 18 .\" Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 .\" or visit www.oracle.com if you need additional information or have any 20 .\" questions. 21 .\" 22 .\" Automatically generated by Pandoc 2.3.1 23 .\" 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