e2image: 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 CentOS possible default full paths are:

/sbin/e2image - from package: e2fsprogs

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/sbin/e2image - from package: e2fsprogs
/usr/lib/debug/sbin/e2image - from package: e2fsprogs-dbg

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

Error in other languages:
e2image: bevel nie gevind nie
e2image: comandă negăsită
e2image: comando não encontrado
e2image: commande introuvable
e2image: command not found
e2image: käsku ei ole
e2image: không tìm thấy lệnh
e2image: komanda nerasta
e2image: Kommando nicht gefunden.
e2image: kommandot finns inte
e2image: komut yok
e2image: nie znaleziono polecenia
e2image: níor aimsíodh an t-ordú
e2image: no se encontró la orden
e2image: no s'ha trobat l'ordre
e2image: opdracht niet gevonden
e2image: parancs nem található
e2image: perintah tidak ditemukan
e2image: príkaz nenájdený
e2image: příkaz nenalezen
e2image: команда не найдена
e2image: командата не е открита
e2image: 命令找不到
e2image: コマンドが見つかりません