most: 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/most - from package: most

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

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