ntu/man/ntu.1
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2026-02-10 13:42:24 +01:00

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.TH NTU 1 "2025-02-10" "NameToUnix 0.3.0" "User Commands"
.SH NAME
ntu \- sanitize file and directory names to Unix conventions
.SH SYNOPSIS
.B ntu
[\fIOPTIONS\fR] \fIPATH\fR...
.SH DESCRIPTION
.B ntu
(NameToUnix) is a command-line tool that renames files and directories
to make them compatible with Unix/Linux naming conventions. It replaces
spaces with underscores, converts German umlauts to their ASCII equivalents,
and removes or replaces problematic special characters.
.PP
The tool processes files recursively, starting from the deepest level to
avoid conflicts with parent directory renames. It preserves file extensions,
including double extensions like .tar.gz, and handles hidden files correctly.
.SH OPTIONS
.TP
.BR \-q ", " \-\-quiet
Suppress output (no rename information on stdout)
.TP
.BR \-n ", " \-\-dry\-run
Show what would be renamed without making actual changes (alias: \-\-no\-changes)
.TP
.BR \-f ", " \-\-force
Overwrite existing files if target already exists
.TP
.BR \-e ", " \-\-exclude " \fIPATTERN\fR"
Exclude files matching glob pattern (can be specified multiple times)
.TP
.BR \-v ", " \-\-verbose
Show verbose debug information
.TP
.BR \-\-modify\-root
Allow renaming of the root directory itself (normally skipped)
.TP
.BR \-\-special
Process symbolic links and special files (normally skipped)
.TP
.BR \-\-no\-color
Disable colored output
.TP
.BR \-h ", " \-\-help
Print help information
.TP
.BR \-V ", " \-\-version
Print version information
.SH TRANSFORMATIONS
.B ntu
applies the following transformations to filenames:
.TP
.B Spaces
Replaced with underscores (_)
.TP
.B German Umlauts
ä → ae, ö → oe, ü → ue, Ä → Ae, Ö → Oe, Ü → Ue, ß → ss
.TP
.B Special Characters
Most special characters are replaced with underscores. Some are preserved
in specific contexts (e.g., C++ is kept intact).
.TP
.B Hidden Files
Files starting with a dot (.) are recognized and preserved correctly.
.TP
.B Double Extensions
Extensions like .tar.gz, .tar.bz2, .tar.xz are preserved as a unit.
.TP
.B Parentheses
Replaced with underscores.
.TP
.B Multiple Underscores
Consecutive underscores are collapsed to a single underscore.
.SH EXCLUDED PATTERNS
By default, the following directories are automatically excluded:
.PP
.nf
.RS
.git/, .svn/, node_modules/, .cache/, __pycache__/
.RE
.fi
.PP
Additional patterns can be excluded using the \fB\-e\fR option.
.SH PARALLEL PROCESSING
For directories with 100 or more files, \fBntu\fR automatically uses
parallel processing to improve performance. For smaller directories,
it processes files sequentially to avoid overhead.
.SH EXAMPLES
.TP
Rename files in current directory (dry-run):
.B ntu \-n .
.TP
Rename files in specific directory:
.B ntu /path/to/directory
.TP
Exclude specific patterns:
.B ntu \-e "*.tmp" \-e "*.bak" /path/to/directory
.TP
Force overwrite existing files:
.B ntu \-f /path/to/directory
.TP
Process multiple directories:
.B ntu /path/one /path/two /path/three
.TP
Verbose output with no colors:
.B ntu \-v \-\-no\-color /path/to/directory
.SH CONFIGURATION
.B ntu
looks for configuration files in the following locations (in order):
.PP
.nf
.RS
./.NameToUnix.conf
~/.config/NameToUnix/config.toml
/etc/NameToUnix/config.toml
.RE
.fi
.PP
Configuration files can customize character replacements and other behavior.
See the project documentation for configuration file format.
.SH EXIT STATUS
.TP
.B 0
Success
.TP
.B 1
Error occurred during processing
.SH SAFETY
.B ntu
performs several safety checks:
.IP \(bu 2
Checks if target file already exists (unless \fB\-\-force\fR is used)
.IP \(bu 2
Verifies write permissions before attempting rename
.IP \(bu 2
Processes files from deepest to shallowest to avoid parent conflicts
.IP \(bu 2
Skips special files unless explicitly requested with \fB\-\-special\fR
.SH BUGS
Report bugs at: https://github.com/jamulix/NameToUnix/issues
.SH AUTHOR
Written by Dieter Schlüter <dieter.schlueter@linix.de>
.SH COPYRIGHT
Copyright \(co 2025 Dieter Schlüter. Licensed under MIT License.
.SH SEE ALSO
.BR rename (1),
.BR detox (1),
.BR mv (1)
.PP
Full documentation at: https://github.com/jamulix/NameToUnix