epestfind: 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/epestfind - from package: emboss

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