slugimage: 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/slugimage - from package: slugimage

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

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