latex2ps: 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/bin/latex2ps - from package: liblatex-driver-perl

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

Error in other languages:
latex2ps: bevel nie gevind nie
latex2ps: comandă negăsită
latex2ps: comando não encontrado
latex2ps: commande introuvable
latex2ps: command not found
latex2ps: käsku ei ole
latex2ps: không tìm thấy lệnh
latex2ps: komanda nerasta
latex2ps: Kommando nicht gefunden.
latex2ps: kommandot finns inte
latex2ps: komut yok
latex2ps: nie znaleziono polecenia
latex2ps: níor aimsíodh an t-ordú
latex2ps: no se encontró la orden
latex2ps: no s'ha trobat l'ordre
latex2ps: opdracht niet gevonden
latex2ps: parancs nem található
latex2ps: perintah tidak ditemukan
latex2ps: príkaz nenájdený
latex2ps: příkaz nenalezen
latex2ps: команда не найдена
latex2ps: командата не е открита
latex2ps: 命令找不到
latex2ps: コマンドが見つかりません