unoconv: 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/unoconv - from package: unoconv

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

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