manhole: 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 CentOS possible default full paths are:

/usr/bin/manhole - from package: python-twisted-core

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/manhole - from package: python-twisted-core

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

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