ts: 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/ts - from package: moreutils

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

On Debian possible default full paths are:

/usr/bin/ts - from package: moreutils

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

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