MUNGE(1) MUNGE Uid 'N' Gid Emporium MUNGE(1) NAME munge - MUNGE credential encoder SYNOPSIS munge [OPTION]... DESCRIPTION The munge program creates an MUNGE credential containing the UID and GID of the calling process. Additional payload data (up to 1 MB) can be encapsu- lated in as well. The returned credential can be passed to another process which can validate its contents (e.g., via the unmunge program). This al- lows an unrelated and potentially remote process to ascertain the identity of the calling process. By default, payload input is read from stdin and the credential is written to stdout. OPTIONS -h, --help Display a summary of the command-line options. -L, --license Display license information. -V, --version Display version information. -n, --no-input Discard all input for the payload. -s, --string string Input payload from the specified string. -i, --input path Input payload from the specified file. -o, --output path Output the credential to the specified file. -c, --cipher string Specify the cipher type, either by name or number. -C, --list-ciphers Display a list of supported cipher types. -m, --mac string Specify the MAC type, either by name or number. -M, --list-macs Display a list of supported MAC types. -z, --zip string Specify the compression type, either by name or number. -Z, --list-zips Display a list of supported compression types. -u, --restrict-uid uid Specify the user name or UID allowed to decode the credential. This will be matched against the effective user ID of the process re- questing the credential decode. -U, --uid uid Specify the user name or UID under which to request the credential. This requires root privileges or the CAP_SETUID capability. -g, --restrict-gid gid Specify the group name or GID allowed to decode the credential. This will be matched against the effective group ID of the process requesting the credential decode, as well as each supplementary group of which the effective user ID of that process is a member. -G, --gid gid Specify the group name or GID under which to request the credential. This requires root privileges or the CAP_SETGID capability. -t, --ttl seconds Specify the time-to-live (in seconds). This controls how long the credential is valid once it has been encoded. A value of 0 selects the default TTL. A value of -1 selects the maximum allowed TTL. Note that munged can impose a maximum allowable TTL for all creden- tials which may be smaller than this value. -S, --socket path Specify the local socket for connecting with munged. EXIT STATUS The munge program returns a zero exit code when the credential is success- fully created and returned. On error, it prints an error message to stderr and returns a non-zero exit code. AUTHOR Chris Dunlap <cdunlap@llnl.gov> COPYRIGHT Copyright (C) 2007-2025 Lawrence Livermore National Security, LLC. Copyright (C) 2002-2007 The Regents of the University of California. MUNGE is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Additionally for the MUNGE library (libmunge), you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the Li- cense, or (at your option) any later version. SEE ALSO remunge(1), unmunge(1), munge(3), munge_ctx(3), munge_enum(3), munge(7), munged(8), mungekey(8). https://github.com/dun/munge munge-0.5.18 2026-02-10 MUNGE(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | AUTHOR | COPYRIGHT | SEE ALSO
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