ticker: 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 Debian possible default full paths are:

/usr/bin/ticker - from package: ticker

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

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