rapidsvn: 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/rapidsvn - from package: rapidsvn

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

On Debian possible default full paths are:

/usr/bin/rapidsvn - from package: rapidsvn

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

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