ts_calibrate: 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_calibrate - from package: tslib

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

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