update-xfonts-traditional: 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/update-xfonts-traditional - from package: xfonts-traditional

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

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