OCSPClient: 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/OCSPClient - from package: pki-java-tools

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

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