inotifywatch: 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/inotifywatch - from package: inotify-tools

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

On Debian possible default full paths are:

/usr/bin/inotifywatch - from package: inotify-tools

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

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