eg: 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/eg - from package: eg
/usr/bin/eg - from package: golang-googlecode-tools-eg

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

On Debian possible default full paths are:

/usr/bin/eg - from package: easygit

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

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