cefsconv: 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/cefsconv - 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/cefsconv - from package: latex-cjk-chinese

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

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