pt-slave-delay: 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/pt-slave-delay - from package: percona-toolkit

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

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