Error on Mac / Linux : Zsh: command not found docbook

It looks like you are trying to run a command that your system cannot find. This can happen for a few reasons:

You might have mistyped the command name. Make sure you are typing the command correctly and that it is spelled correctly.

The command might be located in a different directory than the one you are currently in. In this case, you will need to specify the full path to the command or add the directory where the command is located to your PATH environment variable.

The command you are trying to run might not be installed on your system. In this case, you will need to install the command before you can use it. Try this command:

Brew install docbook

How to Fix Zsh Command Not Found Error on macOS?

Other errors on Mac / Linux :

Command not found llnode
Command not found cloudprober
Command not found hdf5@1.8
Command not found lrzsz
Command not found genact
Command not found fragroute
Command not found thors-serializer
Command not found nicovideo-dl
Command not found csmith
Command not found sambamba
Command not found influxdb@1
Command not found apache-pulsar
Command not found stm32flash
Command not found libghthash
Command not found pugixml
Command not found httm
Command not found dirac
Command not found sleepwatcher
Command not found libbitcoin-blockchain
Command not found poetry
Command not found bee
Command not found yle-dl
Command not found cucumber-ruby
Command not found libusb
Command not found metaproxy
Command not found git-interactive-rebase-tool
Command not found libpointing
Command not found userspace-rcu
Command not found lean-cli
Command not found mat2
Command not found ta-lib
Command not found maven
Command not found rkhunter
Command not found trojan-go
Command not found cmockery
Command not found taskd
Command not found mt32emu
Command not found libspectre
Command not found mavsdk
Command not found libquantum
Command not found snapcast
Command not found lzop
Command not found paket
Command not found pmdmini
Command not found libedit
Command not found cmigemo
Command not found rbspy
Command not found gojq
Command not found zelda-roth-se
Command not found geph2
Command not found tokei
Command not found ifstat
Command not found libcap
Command not found po4a
Command not found hiredis

Zsh: command not found docbook

How to Fix Zsh Command Not Found Error on macOS?