html2article: 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/html2article - from package: golang-html2article

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

On Debian possible default full paths are:

/usr/bin/html2article - from package: golang-go.tools

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

Error in other languages:
html2article: bevel nie gevind nie
html2article: comandă negăsită
html2article: comando não encontrado
html2article: commande introuvable
html2article: command not found
html2article: käsku ei ole
html2article: không tìm thấy lệnh
html2article: komanda nerasta
html2article: Kommando nicht gefunden.
html2article: kommandot finns inte
html2article: komut yok
html2article: nie znaleziono polecenia
html2article: níor aimsíodh an t-ordú
html2article: no se encontró la orden
html2article: no s'ha trobat l'ordre
html2article: opdracht niet gevonden
html2article: parancs nem található
html2article: perintah tidak ditemukan
html2article: príkaz nenájdený
html2article: příkaz nenalezen
html2article: команда не найдена
html2article: командата не е открита
html2article: 命令找不到
html2article: コマンドが見つかりません