yad-icon-browser: 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/yad-icon-browser - from package: yad

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

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