trend: 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/trend - from package: trend

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

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