trickled: 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/trickled - from package: trickle

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

On Debian possible default full paths are:

/usr/bin/trickled - from package: trickle

You may install the required package with command apt-get install {package}

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