dvired: 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/dvired - from package: texlive-dvips

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

On Debian possible default full paths are:

/usr/bin/dvired - from package: texlive-base

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

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