cdr2xhtml: 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/cdr2xhtml - from package: libcdr-tools

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

Error in other languages:
cdr2xhtml: bevel nie gevind nie
cdr2xhtml: comandă negăsită
cdr2xhtml: comando não encontrado
cdr2xhtml: commande introuvable
cdr2xhtml: command not found
cdr2xhtml: käsku ei ole
cdr2xhtml: không tìm thấy lệnh
cdr2xhtml: komanda nerasta
cdr2xhtml: Kommando nicht gefunden.
cdr2xhtml: kommandot finns inte
cdr2xhtml: komut yok
cdr2xhtml: nie znaleziono polecenia
cdr2xhtml: níor aimsíodh an t-ordú
cdr2xhtml: no se encontró la orden
cdr2xhtml: no s'ha trobat l'ordre
cdr2xhtml: opdracht niet gevonden
cdr2xhtml: parancs nem található
cdr2xhtml: perintah tidak ditemukan
cdr2xhtml: príkaz nenájdený
cdr2xhtml: příkaz nenalezen
cdr2xhtml: команда не найдена
cdr2xhtml: командата не е открита
cdr2xhtml: 命令找不到
cdr2xhtml: コマンドが見つかりません