texconfig: 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/texconfig - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/texconfig - from package: texlive-base

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

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