settings2.txt: command not found

Have You tried accessing the binary with the full path?

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/std/settings2.txt - from package: r-cran-qtl

You may install the required package with command apt-get install {package}
Error in other languages:
settings2.txt: bevel nie gevind nie
settings2.txt: comandă negăsită
settings2.txt: comando não encontrado
settings2.txt: commande introuvable
settings2.txt: command not found
settings2.txt: käsku ei ole
settings2.txt: không tìm thấy lệnh
settings2.txt: komanda nerasta
settings2.txt: Kommando nicht gefunden.
settings2.txt: kommandot finns inte
settings2.txt: komut yok
settings2.txt: nie znaleziono polecenia
settings2.txt: níor aimsíodh an t-ordú
settings2.txt: no se encontró la orden
settings2.txt: no s'ha trobat l'ordre
settings2.txt: opdracht niet gevonden
settings2.txt: parancs nem található
settings2.txt: perintah tidak ditemukan
settings2.txt: príkaz nenájdený
settings2.txt: příkaz nenalezen
settings2.txt: команда не найдена
settings2.txt: командата не е открита
settings2.txt: 命令找不到
settings2.txt: コマンドが見つかりません