cslatex: 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/cslatex - from package: texlive-latex

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

On Debian possible default full paths are:

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

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

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