nohtml: 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 Debian possible default full paths are:

/usr/bin/nohtml - from package: emboss

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

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