parchive: 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/bin/parchive - from package: parchive

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

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