mate-terminal: 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/mate-terminal - from package: mate-terminal

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

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