samefile: 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 CentOS possible default full paths are:

/usr/bin/samefile - from package: samefile

You may install the required package with command yum install {package}

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