wicked: 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/wicked - from package: php-horde-wicked

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

On Debian possible default full paths are:

/usr/bin/wicked - from package: php-horde-wicked

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

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