libguestfs-make-fixed-appliance: 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/sbin/libguestfs-make-fixed-appliance - from package: libguestfs-devel

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

On Debian possible default full paths are:

/usr/sbin/libguestfs-make-fixed-appliance - from package: libguestfs-tools

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

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