comgt: command not found

Have You tried accessing the binary with the full path?

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/comgt - from package: comgt

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