icp: 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/icp - from package: renameutils

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

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