rcsclean: 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/rcsclean - from package: rcs

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

On Debian possible default full paths are:

/usr/bin/rcsclean - from package: rcs

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

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