Miscellaneous

Linux tips: Change to Network Manager from Wicd Step 1: If you're using Wicd (under Linux Mint) & you'd encounter "Device not ready" (under Wifi Networks on Network Manager) error, // Stop systemd - wicd.service # systemctl stop wicd // Restart systemd - Network Manager service # systemctl restart NetworkManager.service (Extra: If you're changing from Network Manager to Wicd) // Stop systemd - Network Manager # systemctl stop NetworkManager.service // Prevent Systemd from starting Network Manager at boot # systemctl disable NetworkManager.service // Restart wicd.service # systemctl restart wicd (Further notice: Wicd (leaner) is faster than Network Manager).

Linux tips: updating (wifi) regulatory database Step 1: Download wireless-regdb  Step 2: Download  crda Step 3:  Extract crda & wireless-regdb . Step 4: Change to extracted wireless-regdb directory, # cp /lib/crda/pubkey/*.pem . Step 5:  Edit db.txt Step 6: make && make install Step 7: Change to extracted crda directory, Step 8: Copy the all of the .pem files from wireless-regdb (directory) to extracted crda directory. Step 9: # make && make install [Note: If this message is encountered: "Cannot find development files for any supported version of libnl.  ", # apt-get install libnl-3-dev libnl-genl-3-dev Step 10: reboot & type: # iw reg get    // To test if your changes are reflected. [Notice: The above instructions are tested working on Linux Mint 18.3].

Phone tips: Sony Xperia phone cannot boot up Step 1: Press & hold power button + press volume up button Step 2: When you hear the soft power up sound from your phone, charge your phone. Step 3: Turn off charging & remove charging cable. Step 4: Press power button. Voila ! Your phone can now boot up (if you have enough charge). (Note: Tested on Sony Xperia E4g).