During installation and post installation i have difficulties to turn on my wifi.
wifi-menu wlp4s2 worked on first part of installation. After arch-chroot /mnt I came to following part:
pacman -S wireless_tools wpa_supplicant wpa_actiond dialog
I got error: command not found.
Also, following command is totally not working:
systemctl enable net-auto-wireless.service
And ideas how to solve this?
When files are missing, you should try to find out which package (if any) provides them. pkgfile is a useful tool.
In this case: wifi-menu and net-auto-wireless are part of netcfg, so you could install that. However, netcfg has been deprecated in favor of netctl, so you should probably go with that (or something else entirely, like wicd or NetworkManager).
So, I should install netcfl and wifi-menu will work?
That's pretty much what I said, yes.