predictnls: 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/predictnls - from package: predictnls

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

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