resizer: 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/resizer - from package: gworkspace.app

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

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