edje_external_inspector: 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/edje_external_inspector - from package: libedje-bin

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

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