peerStats: 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/bin/peerStats - from package: cjdns-tools

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