igawk: 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/igawk - from package: gawk

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

On Debian possible default full paths are:

/usr/bin/igawk - from package: gawk

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

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