einverted: command not found

Have You tried accessing the binary with the full path?

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/einverted - from package: emboss

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