gtraceview: 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 Debian possible default full paths are:

/usr/lib/xen-4.4/bin/gtraceview - from package: xen-utils-4.4

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

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