condor_check_userlogs: 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/condor_check_userlogs - from package: condor

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

On Debian possible default full paths are:

/usr/bin/condor_check_userlogs - from package: htcondor

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

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