razor-config-appearance: command not found

Have You tried accessing the binary with the full path?

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/razor-config-appearance - from package: razorqt-config

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

On Debian possible default full paths are:

/usr/bin/razor-config-appearance - from package: razorqt-config

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