pluma: 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/pluma - from package: pluma

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

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