csg_gmxtopol: 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/csg_gmxtopol - from package: votca-csg

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

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