csdp: 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/csdp - from package: coinor-csdp

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

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