mono-sgen-gdb.py: 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"

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