synaptikscfg: 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/synaptikscfg - from package: kde-config-touchpad

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