sundials-config: 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/sundials-config - from package: libsundials-serial-dev

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

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