Miscellaneous

Linux Tips: Input/Output Error (Linux mint)  If you're suddenly getting Input/Output Error (under Linux Mint) when opening some apps but not when trying others (& your partition is not readonly), try to remember if you'd updated anything (using Update Manager) when you'd previously logged in. If you did, try the following steps: (1) go into GRUB's recovery mode (if you can't get a terminal on desktop mode), get a root prompt. (2) Enter password for root prompt. (3) Look under /var/log/synaptic/history.log (or similar)    // Purge every update that's installed when you'd last logged in (during last boot) (4) # apt-get --purge remove [name of update] (5) $ apt-get clean (6) reboot -- Else, you could have a failing hdd. Good Luck.

Firefox tips: Disable (potential problematic) settings from about:config Note: you can disable/enable settings from about:config by just typing " about:config " into the browser url. Potential Javascript attack vectors: dom.event.clipboardevents.enabled=false dom.battery.enabled=false browser.send_pings=false webgl.disabled=true Risk from proprietary addon: browser.pocket.enabled=false extensions.pocket.enabled=false  extensions.pocket.oAuthConsumerKey -> delete value browser.newtabpage.activity-stream.section.highlights.includePocket -> false browser.newtabpage.activity-stream.pocketCta -> delete value WebRTC media.peerconnection.enabled=false DRM media.eme.enabled=false GeoLocation geo.enabled=false geo.wifi.uri="" beacon.enabled=false Device tracking device.sensors.enabled=false camera.control.face_detection.enabled=false datareporting.policy.dataSubmissionEnabled=false Link pre-fetch network.http.specula...

Phone Tips: Android Notifications do not stop playing If you'd encountered your android (e.g. : Android 7.0) phone's notifications refusal to stop playing (& there isn't any way to turn it off) - when a notification occurs, fret no more: Step 1: Go to Settings Step 2: Go to Battery Step 3: Press on Remaining time Step 4: Press on Battery Optimization Step 5: Press on Optimize all (as many times as require, usually just requiring twice) until all apps are Not optimized ! Step 6: Done. Or alternatively (if the above instructions don't work): Step 1a: Go to Settings Step 2a: Click on search icon & type: reminder     // to search Step 3a: At Priority only allows screen, disable everything (e.g: reminders, events, messages, calls, repeat callers etc).

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).

Linux tips: Find the DNS Nameservers (DHCP) If you're looking for the DNS servers (IP) for your ISP through your working (DHCP) internet connection: Step 1: #  cat /var/lib/dhcp/dhclient.leases Step 2: (a) Look for your interface's name (e.g: eth0/eth1/wlan0) that's connected to internet (b) Look under: option domain-name-servers xxx.xxx.xxx.xxx, yyy.yyy.yyy.yyy (Tested working on Linux Mint 18.3).