ecaccess-certificate-create: 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/ecaccess-certificate-create - from package: ecaccess

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

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