cronolog: 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/sbin/cronolog - from package: cronolog

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

On Debian possible default full paths are:

/usr/bin/cronolog - from package: cronolog

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

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