wm-icons-config: 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/wm-icons-config - from package: wm-icons

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

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