e2ps: 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/e2ps - from package: e2ps

You may install the required package with command apt-get install {package}
Error in other languages:
e2ps: bevel nie gevind nie
e2ps: comandă negăsită
e2ps: comando não encontrado
e2ps: commande introuvable
e2ps: command not found
e2ps: käsku ei ole
e2ps: không tìm thấy lệnh
e2ps: komanda nerasta
e2ps: Kommando nicht gefunden.
e2ps: kommandot finns inte
e2ps: komut yok
e2ps: nie znaleziono polecenia
e2ps: níor aimsíodh an t-ordú
e2ps: no se encontró la orden
e2ps: no s'ha trobat l'ordre
e2ps: opdracht niet gevonden
e2ps: parancs nem található
e2ps: perintah tidak ditemukan
e2ps: príkaz nenájdený
e2ps: příkaz nenalezen
e2ps: команда не найдена
e2ps: командата не е открита
e2ps: 命令找不到
e2ps: コマンドが見つかりません