ceflatex: 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/ceflatex - from package: texlive-east-asian

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

On Debian possible default full paths are:

/usr/bin/ceflatex - from package: latex-cjk-chinese

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

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