settings.dat: 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/share/doc/r-cran-qtl/examples/bin/test/settings.dat - from package: r-cran-qtl

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

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