ctags
Generate an index (or tag) file of language objects found in source files for many popular programming languages. tldr-pages
On several platforms
Several platforms
Generate tags for a single file and output them to a file named "tags" in the current directory, overwriting the file if it exists
ctags path/to/fileIdentifyGenerate tags for all files in the current directory and output them to a specific file, overwriting the file if it exists
ctags -f path/to/file *IdentifyGenerate tags for all files in the current directory and all subdirectories
ctags --recurseIdentifyGenerate tags for a single file and output them with start line number and end line number in JSON format
ctags --fields=+ne --output-format=json path/to/fileIdentify