Finding unicode symbols on the shell Steckerhalter's ƛ

Sometimes I want to know if there is a unicode symbol for a certain topic. There is a convenient tool on the command line that allows to do exactly that. For example to find something regarding computer:

$ unicode computer
U+1F4BB PERSONAL COMPUTER
UTF-8: f0 9f 92 bb UTF-16BE: d83ddcbb Decimal: 💻 Octal: \0372273
💻
Category: So (Symbol, Other)
Bidi: ON (Other Neutrals)

U+1F5A5 DESKTOP COMPUTER
UTF-8: f0 9f 96 a5 UTF-16BE: d83ddda5 Decimal: 🖥 Octal: \0372645
🖥

Or to find a symbol for mail:

$ unicode mail
U+1F4E7 E-MAIL SYMBOL
UTF-8: f0 9f 93 a7 UTF-16BE: d83ddce7 Decimal: 📧 Octal: \0372347
📧
Category: So (Symbol, Other)
Unicode block: 1F300..1F5FF; Miscellaneous Symbols and Pictographs
Bidi: ON (Other Neutrals)

On Debian/Ubuntu the unicode tool is installed thus:

apt-get install unicode