xinput_calibrator: 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/xinput_calibrator - from package: xinput_calibrator

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

On Debian possible default full paths are:

/usr/bin/xinput_calibrator - from package: xinput-calibrator

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

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