logcheck-test: 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/logcheck-test - from package: logcheck

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

On Debian possible default full paths are:

/usr/bin/logcheck-test - from package: logcheck

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

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