mysqlauditgrep: 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/mysqlauditgrep - from package: mysql-utilities

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

On Debian possible default full paths are:

/usr/bin/mysqlauditgrep - from package: mysql-utilities

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

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