timelimit: 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/timelimit - from package: timelimit

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

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