texpire: 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 Debian possible default full paths are:

/usr/sbin/texpire - from package: leafnode

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

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