patchperl: 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/patchperl - from package: perl-Devel-PatchPerl

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

On Debian possible default full paths are:

/usr/bin/patchperl - from package: libdevel-patchperl-perl

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

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