ts_harvest: 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_harvest - from package: tslib

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

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