show_all_colors: 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 Debian possible default full paths are:

/usr/bin/show_all_colors - from package: libterm-extendedcolor-perl

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

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