tspush: 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/tspush - from package: trafficserver

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

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