eid: 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/eid - from package: id-utils

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

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