tuxcmd: 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/tuxcmd - from package: tuxcmd

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

On Debian possible default full paths are:

/usr/bin/tuxcmd - from package: tuxcmd

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

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