condor_init: 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/condor_init - from package: condor

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

On Debian possible default full paths are:

/usr/sbin/condor_init - from package: htcondor

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

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