icom: 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/icom - from package: icom

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

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