perltex: 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/perltex - from package: texlive-texmf-latex

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

On Debian possible default full paths are:

/usr/bin/perltex - from package: texlive-latex-extra

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

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