Gfrktyl

I have the above USB card. On Windows it works.

On Mint, though...

So, I got the mini CD that came with the device and there are drivers folders for Windows, MAC OSX and Linux as general...

As there's a install.sh file inside the one that matters for the case, I followed a guide from wikiHow (https://www.wikihow.com/Execute-INSTALL.sh-Files-in-Linux-Using-Terminal) as follows:

After extracting: chmod +x install.sh
Then: sudo bash install.sh AND sudo ./install.sh (after got an error on first try)

The result is a bunch of errors along the process: PrintScreen

Also, if someone wants to check the files from REALTEK: https://mega.nz/#!fzJlSIiR!LKfvAcCtyu_EcXI3cXrNTByIDAjeU1_swo5jV3PN-qo

Does anybody have ideas on how to correct and make the USB Dongle works for Wi-Fi?

PS: I hope making those files available doesn't infringe any CopyRights...

So, the guys from the Mint Forum, helped superbly along with the guys from VivaoLinux.com.br:

I prefer to live a response as this may help someone in the future! :D

So, the steps are:

git clone https://github.com/kelebek333/rtl8188fu.git

cd rtl8188fu

make 

sudo make install

Then, if there's the following problem:

$ make

make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.15.0-20-generic/build M=/home/^/rtl8188fu  modules

make[1]: Entering directory '/usr/src/linux-headers-4.15.0-20-generic'

Makefile:976: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"

  CC [M]  /home/^/rtl8188fu/core/rtw_cmd.o

  CC [M]  /home/^/rtl8188fu/core/rtw_security.o

  CC [M]  /home/^/rtl8188fu/core/rtw_debug.o

  CC [M]  /home/^/rtl8188fu/core/rtw_io.o

  CC [M]  /home/^/rtl8188fu/core/rtw_ioctl_query.o

  CC [M]  /home/^/rtl8188fu/core/rtw_ioctl_set.o

  CC [M]  /home/^/rtl8188fu/core/rtw_ieee80211.o

  CC [M]  /home/^/rtl8188fu/core/rtw_mlme.o

  CC [M]  /home/^/rtl8188fu/core/rtw_mlme_ext.o

  CC [M]  /home/^/rtl8188fu/core/rtw_wlan_util.o

  CC [M]  /home/^/rtl8188fu/core/rtw_vht.o

  CC [M]  /home/^/rtl8188fu/core/rtw_pwrctrl.o

  CC [M]  /home/^/rtl8188fu/core/rtw_rf.o

  CC [M]  /home/^/rtl8188fu/core/rtw_recv.o

  CC [M]  /home/^/rtl8188fu/core/rtw_sta_mgt.o

  CC [M]  /home/^/rtl8188fu/core/rtw_ap.o

  CC [M]  /home/^/rtl8188fu/core/rtw_xmit.o

  CC [M]  /home/^/rtl8188fu/core/rtw_p2p.o

  CC [M]  /home/^/rtl8188fu/core/rtw_tdls.o

  CC [M]  /home/^/rtl8188fu/core/rtw_br_ext.o

  CC [M]  /home/^/rtl8188fu/core/rtw_iol.o

  CC [M]  /home/^/rtl8188fu/core/rtw_sreset.o

  CC [M]  /home/^/rtl8188fu/core/rtw_btcoex.o

  CC [M]  /home/^/rtl8188fu/core/rtw_beamforming.o

  CC [M]  /home/^/rtl8188fu/core/rtw_odm.o

  CC [M]  /home/^/rtl8188fu/core/efuse/rtw_efuse.o

  CC [M]  /home/^/rtl8188fu/os_dep/osdep_service.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/os_intfs.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/usb_intf.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/usb_ops_linux.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/ioctl_linux.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/xmit_linux.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/mlme_linux.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/recv_linux.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/ioctl_cfg80211.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/wifi_regd.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/rtw_proc.o

  CC [M]  /home/^/rtl8188fu/os_dep/linux/ioctl_mp.o

  CC [M]  /home/^/rtl8188fu/hal/hal_intf.o

  CC [M]  /home/^/rtl8188fu/hal/hal_com.o

  CC [M]  /home/^/rtl8188fu/hal/hal_com_phycfg.o

  CC [M]  /home/^/rtl8188fu/hal/hal_phy.o

  CC [M]  /home/^/rtl8188fu/hal/hal_dm.o

  CC [M]  /home/^/rtl8188fu/hal/hal_btcoex.o

  CC [M]  /home/^/rtl8188fu/hal/hal_mp.o

  CC [M]  /home/^/rtl8188fu/hal/hal_hci/hal_usb.o

  CC [M]  /home/^/rtl8188fu/hal/led/hal_usb_led.o

  CC [M]  /home/^/rtl8188fu/hal/HalPwrSeqCmd.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/Hal8188FPwrSeq.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_sreset.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_hal_init.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_phycfg.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_rf6052.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_dm.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_rxdesc.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/rtl8188f_cmd.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/usb/usb_halinit.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/usb/rtl8188fu_led.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/usb/rtl8188fu_xmit.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/usb/rtl8188fu_recv.o

  CC [M]  /home/^/rtl8188fu/hal/rtl8188f/usb/usb_ops.o

  CC [M]  /home/^/rtl8188fu/hal/efuse/rtl8188f/HalEfuseMask8188F_USB.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_debug.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_antdiv.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_antdect.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_interface.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_hwconfig.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/halphyrf_ce.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_edcaturbocheck.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_dig.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_pathdiv.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_rainfo.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_dynamicbbpowersaving.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_powertracking_ce.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_dynamictxpower.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_adaptivity.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_cfotracking.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_noisemonitor.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_acs.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/phydm_beamforming.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/txbf/halcomtxbf.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/txbf/haltxbfinterface.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/halhwimg8188f_bb.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/halhwimg8188f_mac.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/halhwimg8188f_rf.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/halhwimg8188f_fw.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/phydm_regconfig8188f.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/halphyrf_8188f.o

  CC [M]  /home/^/rtl8188fu/hal/phydm/rtl8188f/phydm_rtl8188f.o

  CC [M]  /home/^/rtl8188fu/core/rtw_mp.o

  CC [M]  /home/^/rtl8188fu/core/rtw_mp_ioctl.o

  LD [M]  /home/^/rtl8188fu/rtl8188fu.o

  Building modules, stage 2.

  MODPOST 1 modules

  CC      /home/^/rtl8188fu/rtl8188fu.mod.o

  LD [M]  /home/^/rtl8188fu/rtl8188fu.ko

make[1]: Leaving directory '/usr/src/linux-headers-4.15.0-20-generic'

That will probably generate the following:

$ sudo make install

install -p -m 644 .ko  /lib/modules/4.15.0-20-generic/kernel/drivers/net/wireless/

install: cannot stat '.ko': No such file or directory

Makefile:481: recipe for target 'install' failed

make: *** [install] Error 1

Do:

sudo apt install libelf-dev

Then:

cd rtl8188fu

make clean

cd

sudo dkms add ./rtl8188fu

sudo dkms install rtl8188fu/1.0

Now, reboot. Your Wi-Fi should now be working!

Thanks a lot and all the best!