imtools.py: 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/share/cinnamon/cinnamon-settings/bin/imtools.py - from package: cinnamon-common

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

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