pdfcslatex: 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/pdfcslatex - from package: texlive-latex

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

On Debian possible default full paths are:

/usr/bin/pdfcslatex - from package: texlive-lang-czechslovak

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

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