cphead: 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/cphead - from package: wcstools

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

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