update-cudf-solvers: 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/sbin/update-cudf-solvers - from package: apt-cudf

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

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