trimage: 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/trimage - from package: trimage

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

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