bitten-slave: 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/bitten-slave - from package: bitten-slave

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

On Debian possible default full paths are:

/usr/bin/bitten-slave - from package: trac-bitten-slave

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

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