icerun: 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/icerun - from package: icecream

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

On Debian possible default full paths are:

/usr/bin/icerun - from package: icecc

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

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