cjdns-traceroute: 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

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/cjdns-traceroute - from package: cjdns-tools

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