sslogger-slogd: command not found

Have You tried accessing the binary with the full path?

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/sslogger-slogd - from package: sslogger-slogd

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