ps2ts: 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/ps2ts - from package: tstools

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

Error in other languages:
ps2ts: bevel nie gevind nie
ps2ts: comandă negăsită
ps2ts: comando não encontrado
ps2ts: commande introuvable
ps2ts: command not found
ps2ts: käsku ei ole
ps2ts: không tìm thấy lệnh
ps2ts: komanda nerasta
ps2ts: Kommando nicht gefunden.
ps2ts: kommandot finns inte
ps2ts: komut yok
ps2ts: nie znaleziono polecenia
ps2ts: níor aimsíodh an t-ordú
ps2ts: no se encontró la orden
ps2ts: no s'ha trobat l'ordre
ps2ts: opdracht niet gevonden
ps2ts: parancs nem található
ps2ts: perintah tidak ditemukan
ps2ts: príkaz nenájdený
ps2ts: příkaz nenalezen
ps2ts: команда не найдена
ps2ts: командата не е открита
ps2ts: 命令找不到
ps2ts: コマンドが見つかりません