cjdnslog: 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/cjdnslog - from package: cjdns-tools

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

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