mc.csh: 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/share/mc/bin/mc.csh - from package: mc

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

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