Etsearch: 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/Etsearch - from package: eterm

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

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