xtrace: 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/xtrace - from package: glibc-utils

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

On Debian possible default full paths are:

/usr/bin/xtrace - from package: xtrace

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

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