eggsh: 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/sbin/eggsh - from package: gcpegg

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

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