dictunformat: command not found

Have You tried accessing the binary with the full path?

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/dictunformat - from package: dictfmt

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