pstruct: 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/pstruct - from package: perl

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

On Debian possible default full paths are:

/usr/bin/pstruct - from package: perl

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

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