linux_logo: 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/linux_logo - from package: linux_logo

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

On Debian possible default full paths are:

/usr/bin/linux_logo - from package: linuxlogo

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

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