cpmchmod: 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 CentOS possible default full paths are:

/usr/bin/cpmchmod - from package: cpmtools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/cpmchmod - from package: cpmtools

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

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