htfuzzy: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/htfuzzy - from package: htdig

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/htfuzzy - from package: htdig

You may install the required package with command apt-get install {package}

Error in other languages:
htfuzzy: bevel nie gevind nie
htfuzzy: comandă negăsită
htfuzzy: comando não encontrado
htfuzzy: commande introuvable
htfuzzy: command not found
htfuzzy: käsku ei ole
htfuzzy: không tìm thấy lệnh
htfuzzy: komanda nerasta
htfuzzy: Kommando nicht gefunden.
htfuzzy: kommandot finns inte
htfuzzy: komut yok
htfuzzy: nie znaleziono polecenia
htfuzzy: níor aimsíodh an t-ordú
htfuzzy: no se encontró la orden
htfuzzy: no s'ha trobat l'ordre
htfuzzy: opdracht niet gevonden
htfuzzy: parancs nem található
htfuzzy: perintah tidak ditemukan
htfuzzy: príkaz nenájdený
htfuzzy: příkaz nenalezen
htfuzzy: команда не найдена
htfuzzy: командата не е открита
htfuzzy: 命令找不到
htfuzzy: コマンドが見つかりません