gtick: 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 Debian possible default full paths are:

/usr/bin/gtick - from package: gtick

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