The project is in a healthy, maintained state
This command line tool `cr` is used to record and explain cryptic commands, acronyms and so forth in daily life. Not only can it be used in computer filed via our default sheet cryptic_computer, but also you can use this to manage your own knowledge base easily.


~> 2.0
 Project Readme

Cryptic Resolver


word-count Gem Version


This command line tool cr is used to record and explain cryptic commands, acronyms and so forth in daily life. The effort is to study etymology and know of naming conventions.

Not only can it be used in the computer filed, but also you can use this to manage your own knowledge base easily.

  • Currently we have 437 keywords explained in our default sheets.

Default Sheets


gem install cryptic-resolver

Tested well on Ubuntu and Windows 11.


The aim of this project is to:

  1. make cryptic things clear
  2. help maintain your own personal knowledge base

rather than

  1. record the use of a command, for this you can refer to tldr, cheat and so on.


$ cr emacs
# -> Emacs: Edit macros
# ->
# ->   a feature-rich editor
# ->
# -> SEE ALSO Vim 

$ cr -u 
# -> update all sheets

$ cr -u
# -> Add your own knowledge base! 

$ cr -h
# -> show help


cr is written in pure Ruby. You can implement this tool in any other language you like(name your projects as cr_python for example), just remember to reuse our cryptic_computer or other sheets which are the core parts anyone can contribute to.

Sheet layout

Sheet is the knowledgebase. Every sheet should be a git repository. And each should contain these files(we call these dictionarys):

  1. 0123456789.toml
  2. a.toml
  3. b.toml
  4. ...
  5. z.toml

Dictionary format(File format)

In every file(or dictionary), your definition format looks like this in pure toml:

# A normal definition
#   We MUST keep the key downcase
#   We use a key 'disp' to display its original form 
#   Because the case sometimes contains details to help we understand
#   And 'disp' && 'desc' is both MUST-HAVE. 
#   But if you use 'same', all other infos are not needed.   
disp = "XDG"
desc = "Cross Desktop Group"

# If you want to explain more, use 'full'
disp = "xxd"
desc = "hex file dump"
full = "Why call this 'xxd' rather than 'xd'?? Maybe a historical reason"

# If there are multiple meanings, you should add a subkey to differ
disp = "XDM"
desc = "eXtreme Download Manager"

disp = "XDM"
desc = "X Display Manager"

We have more features than above

disp = "JPEG"
desc = "Joint Photographic Experts Group"
full = "Introduced in 1992. A commonly used method of lossy compression for digital images"
see = ['MPG','PNG'] # This is a `see also`

same = "JPEG" # We just need to redirect this. No duplicate!

same = "xdm" # If we direct to a multimeaning word, we don't need to specify its category(subkey).

disp = "H.265"
desc = "A video compression standard" # The 'dot' keyword supported using quoted strings

Name collision

In one sheet, you should consider adding a subkey to differ each other like the example above.

But what if a sheet has 'gdm' while another also has a 'GDM'?

That's nothing, because cr knows this.

But what if a sheet has two 'gdm'?

This will lead to toml's parser library fail. You have these solutions

  1. Use a better lint for example: VSCode's Even Better TOML
  2. Watch the fail message, you may notice 'override path xxx', the xxx is the collision, you may correct it back manually.

cr in Ruby development

maybe you need sudo access

  • gem build cryptic-resolver
  • gem install cryptic-resolver -l
  • gem uninstall cryptic-resolver
  • gem update cryptic-resolver (--pre)
  • gem push cryptic-resolver-x.x.gem


cr itself is under MIT

Official default sheets are all under CC-BY-4.0