ecaccess-file-size: 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-file-size - from package: ecaccess

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

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