ckport: 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/ckport - from package: ckport

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

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