xtermset: 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/xtermset - from package: xtermset

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

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