expire: 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/lib/news/bin/expire - from package: inn2
/usr/lib/news/bin/expire - from package: inn

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

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