html2text: 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/html2text - from package: html2text

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

On Debian possible default full paths are:

/usr/bin/html2text - from package: html2text

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

Error in other languages:
html2text: bevel nie gevind nie
html2text: comandă negăsită
html2text: comando não encontrado
html2text: commande introuvable
html2text: command not found
html2text: käsku ei ole
html2text: không tìm thấy lệnh
html2text: komanda nerasta
html2text: Kommando nicht gefunden.
html2text: kommandot finns inte
html2text: komut yok
html2text: nie znaleziono polecenia
html2text: níor aimsíodh an t-ordú
html2text: no se encontró la orden
html2text: no s'ha trobat l'ordre
html2text: opdracht niet gevonden
html2text: parancs nem található
html2text: perintah tidak ditemukan
html2text: príkaz nenájdený
html2text: příkaz nenalezen
html2text: команда не найдена
html2text: командата не е открита
html2text: 命令找不到
html2text: コマンドが見つかりません