debiandoc2info: 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/debiandoc2info - from package: debiandoc-sgml

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

Error in other languages:
debiandoc2info: bevel nie gevind nie
debiandoc2info: comandă negăsită
debiandoc2info: comando não encontrado
debiandoc2info: commande introuvable
debiandoc2info: command not found
debiandoc2info: käsku ei ole
debiandoc2info: không tìm thấy lệnh
debiandoc2info: komanda nerasta
debiandoc2info: Kommando nicht gefunden.
debiandoc2info: kommandot finns inte
debiandoc2info: komut yok
debiandoc2info: nie znaleziono polecenia
debiandoc2info: níor aimsíodh an t-ordú
debiandoc2info: no se encontró la orden
debiandoc2info: no s'ha trobat l'ordre
debiandoc2info: opdracht niet gevonden
debiandoc2info: parancs nem található
debiandoc2info: perintah tidak ditemukan
debiandoc2info: príkaz nenájdený
debiandoc2info: příkaz nenalezen
debiandoc2info: команда не найдена
debiandoc2info: командата не е открита
debiandoc2info: 命令找不到
debiandoc2info: コマンドが見つかりません