dgtst: 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/dgtst - from package: ptscotch

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

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