deallocvt: 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/deallocvt - from package: kbd

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

On Debian possible default full paths are:

/usr/bin/deallocvt - from package: kbd

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

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