innotop: 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/innotop - from package: innotop

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

On Debian possible default full paths are:

/usr/bin/innotop - from package: mariadb-client-10.0
/usr/bin/innotop - from package: mysql-client-5.5

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

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