superkaramba: 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 CentOS possible default full paths are:

/usr/bin/superkaramba - from package: kdeutils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/superkaramba - from package: plasma-scriptengine-superkaramba

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

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