estwolefind: 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/estwolefind - from package: hyperestraier

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

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