s2p: 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/s2p - from package: perl

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

On Debian possible default full paths are:

/usr/bin/s2p - from package: perl

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

Error in other languages:
s2p: bevel nie gevind nie
s2p: comandă negăsită
s2p: comando não encontrado
s2p: commande introuvable
s2p: command not found
s2p: käsku ei ole
s2p: không tìm thấy lệnh
s2p: komanda nerasta
s2p: Kommando nicht gefunden.
s2p: kommandot finns inte
s2p: komut yok
s2p: nie znaleziono polecenia
s2p: níor aimsíodh an t-ordú
s2p: no se encontró la orden
s2p: no s'ha trobat l'ordre
s2p: opdracht niet gevonden
s2p: parancs nem található
s2p: perintah tidak ditemukan
s2p: príkaz nenájdený
s2p: příkaz nenalezen
s2p: команда не найдена
s2p: командата не е открита
s2p: 命令找不到
s2p: コマンドが見つかりません