msort: 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/msort - from package: msort

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

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