texexec: 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/texexec - from package: texlive-context

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

On Debian possible default full paths are:

/usr/bin/texexec - from package: context

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

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