Internal Memory – Is it safe to delete logcat.txt files or the entire psysinfo folder to make more space on my Android phone?

I have an Android phone and the storage space on the SD card is running low …
(I do not understand how Android works – just a simple user.)
In the following directory: mnt> sdcard

There is a psysinfo folderthat is 3.02 GB …
And in this folder there are subfolders like log6, log5
and so on.
These subfolders contain a few logcat.txt files, three of which are about 1 GB in size.

Will my Android phone work properly if I just delete those files and free up some memory (3.02 GB)?
I look at the folders with & # 39; ES File Explorer & # 39; and think about deleting these files with the same app. This app says that the above folder and the logcat.txt files are the largest in my phone. My Android version is 4.1.2.

I searched online to find out what the [ …> psysinfo ] Folder in Android, but I could not find any information about it and then searched for logcat.txt files, but the information available seems to be for people like developers. I could not really understand it.


bitcoin core – When using importmulti with the internal value true, no change keys are added. What am I doing wrong?

First, I call:

curl --data-binary & # 39; "jsonrpc": "1.0", "id": "curltest", "method": "createwallet", "params":["ColdWallet", true] } & # 39; -H & # 39; Content type: text / plain; & # 39; http: // user: password@ 18332 /

Which gives back:

Result = {
name = ColdWallet;
warning = "";

I then import keys into the key pool:

bitcoin-cli getdescriptorinfo "wpkh (tpubDFLL8VNUhpLNVLw8179WCEuMztKtTDd7EeYeFDtThzisj6wfJ4Zi43qUvCE7ciCFxVKZYssRr9P9PerLefkCvCvKVKVKVKVK

responseString = {

"isrange": true,
"issolvable": true,
"hasprivatekeys": false


bitcoin-cli -rpcwallet = ColdWallet importmulti & # 39;[{ "desc": "wpkh(tpubDFLL8VNUhpLNVLw8179WCEuMZtKtTDd7EeYeFDtThzisj6wfJ4Zi43qUvCE7ciCFxVKZYssRr9P9PerLefkVEjKL6CphUvbGv1CrSCS2KUB/*)#udrnh6f5", "timestamp": "now", "range": [0, 99], "watchonly": true, "label": "fully noded cold storage", "keypool": true, "internal": false, "rescan": false}]& # 39;

Result = (
Success = 1;

I then stopped KeyPool to not correct and internally to true:

bitcoin-cli -rpcwallet = ColdWallet importmulti & # 39;[{ "desc": "wpkh(tpubDFLL8VNUhpLNVLw8179WCEuMZtKtTDd7EeYeFDtThzisj6wfJ4Zi43qUvCE7ciCFxVKZYssRr9P9PerLefkVEjKL6CphUvbGv1CrSCS2KUB/*)#udrnh6f5", "timestamp": "now", "range": [100, 199], "watchonly": true, "keypool": false, "internal": true, "rescan": false}]& # 39;

Result = (
Success = 1;

I can use getnewaddress -rpcwallet = ColdWallet without a problem but when I try it:

curl --data-binary & # 39; "jsonrpc": "1.0", "id": "curltest", "method": "walletcreatefundedpsbt", "params":[[].[{"mxV3ojsAHKuYHoDVqYczs6iPAfCCYESEDc":0.0001}]]} & # 39; -H & # 39; Content type: text / plain; & # 39; http: // user: password@ 18332 / wallet / ColdWallet

Result = {

error = {
code = "-4";
message = "No address change key can be generated, there are no keys in the internal key pool, and keys can not be generated.";
id = curltest;
result = "";


Furthermore call bitcoin-cli rpcwallet = ColdWallet getwalletinfo


"wallet name": "ColdWallet",
"walletversion": 169900,
"Balance": 0.00000000,
"unconfirmed balance": 0.00000000,
"immature balance": 0.00000000,
"txcount": 1,
"keypoololdest": 1561077339,
"keypoolsize": 98,
"keypoolsize_hd_internal": 0,
"paytxfee": 0.00000000,
"private_keys_enabled": false

Is this a bug? Or am I doing something wrong?

I use Bitcoin Core as the backend for an app I'm developing, and I want the user to easily make cold transactions with the keys he imports into the wallet without having to change an address every time.

Time Machine Backup is not restored to my internal hard disk drive

I had a serious hard drive failure and replaced the hard drive of my MacBook Mid 2012 13 "model with another one with 1 TB, running on the latest version of" Mojave "MacOS.

I am recovering from the Time Machine (TM) backup, and I am told that the restore is only now done on an SSD drive because APFS systems can only be restored to SSDs. I was not even aware that my Time Machine did backups in APFS.

So I'm really stuck here. Is this the very dirty way for Apple to tell me to buy a new MacBook with an SSD drive to continue using TM backups and other system features? How planned obsolescence? Or did I do something wrong? The complete message that appears when I perform the CMS + R recovery startup and try to recover from TM:

The system can not be restored to this disk because this is possible with APFS systems
only be restored to internal SSDs. Reinstall MacOS on this floppy disk and
Then use the Migration Assistant to transfer data from your backup

SEO – Does a lot of relevant internal links influence the ranking of the pages and is there a limit?

We are revising our internal linkage strategy in my workplace.

The current implementation uses a series of links and places them on a number of pages accessible from the header. Some links appear more often than others.

Consider these two cases:

case 1

Source page: Summer shorts for men

Interner Link zu: Summer Shorts for Women
Internal link to: Ladies hats
Interner Link to: Sweatpants

Case # 2

Source page: Summer shorts for men

Interner Link zu: Swimsuits for men in oversize
Interner Link zu: Men's sunscreen
Interner Link zu: Men's sweatpants

Case 1 contains internal links that are not directly related to the source page, but case 2.

Does one of the two cases influence the ranking of the pages?

Second question: Is there a gold standard for the frequency with which a link can be displayed on the website? What happens if a link from 500 different pages is linked?

Dual Boot – How do I disconnect an internal ("fixed") USB device from Ubuntu 18.04?

When I type lsusb I see a list of connected USB devices. One of them is 0955: 7002 – "Nvidia Stereo Controller", which causes me many problems. I want to remove the device, but I do not understand how it works. Is it a physical device that is internally connected? Is it a virtual device? The attribute "removable" is "fixed". Of course, nothing is connected to the external USB ports.

I'm working on a laptop with Nvidia GPU installed (I do not think it has anything to do with my problem) and have a dual boot: Ubuntu 18.04 and Windows 7. On the Windows side I can use the above device in the device Manager and I can disable it as well, but I think it's irrelevant to what's happening on the Ubuntu side … (I've tried to disable it for all cases, to no avail, and I do not want to risk it to uninstall it)

All the information, also to better understand the situation (in the comments pls), will help.

Internal memory – Samsung Galaxy S6 4.6 MB / s sequential write access (Why slow?)

I bought a Samsung Galaxy S6 in August 2016. Everything was fine until last week.
It has very sluggishly. For example, if I draw my unlock pattern after a reboot, it will take a while to load the boot screen until the screen turns off. I get in after a few tries, but each tap takes a long time to respond. Loading the keyboard takes about 25 seconds.

I downloaded System Monitor, but the CPU usage was not 100%, so there is no app / virus that consumes too much CPU time.
According to Geekbench 4, the CPU / GPU performance for the Galaxy S6 is even above average.

But then I decided to test the memory speed. I ran Androbench and the results are very bad (see screenshot).
Screenshot of Androbench

Normally, the performance should conform to this test.

My questions are: How can I find out why storage is so slow?
Is it just Flash Wear? Is a driver broken? Which part should I replace if it is a hardware error?

If something is unclear, just comment it and I'll work on the question.
Thank you in advance!

Overwriting an internal method with Decorator Design Pattern

I am writing an object-oriented code in which I try to use the Decorator pattern to implement a set of optimizations to be applied to a family of core classes at run time. The core behavior of core classes is a complex behavior that is fully implemented in these classes, which actually invokes other internal methods to accomplish parts of the task.
The decorators only adapt the internal methods invoked by the complex behavior in the core class.

Here's a pseudo code for what I want to achieve:

Interface I {
Step 1();
Step 2();
Class C implements I {
this.step1 ();
this.step2 ();
Step 1(){
Step 2(){
abstract class decorator implements I {
I wrapped up;
Constructor (I obj) {
this.wrapped = obj;
this.wrapped.complex ();
Step 1(){
this.wrapped.step1 ();
Step 2(){
this.wrapped.step2 ();
Class ConcreteDecorator extends Decorator {
Constructor (I obj) {
super (obj);
Step 2(){
... // adjusting step2 ()

There are a lot of customizations that can be combined with each other, and that's the main reason why I use decorative patterns. Otherwise, I can create dozens to hundreds of subtypes for every possible combination of customizations.

Now when I try to create an object of the decorated class:

x = new C ();
y = new ConcreteDecorator (x);
y.complex ();

I expect that Complex() The method to be executed is formed from the wrapped core object while using the overwritten one Step 2() Method of the decorator. However, this does not work because the complex () method in abstract decorator directly calls the method for the core object, which actually skips overwriting Step 2() in the decorator.

My ultimate goal is to allow the decorators to do just one or a few stepx () Methods and that would be called from the Complex() Method that is already implemented in the core object and calls all steps.

Could this functionality even be implemented using the decorator design pattern? If so, how and if not, what pattern this problem can be solved.

To update: Use the core classes stencil pattern by defining the steps of a long algorithm Complex() Method. My intention is to override the steps Decorator pattern,

I have researched Chain of Responsibility pattern (Middleware), but I prefer to use the decorator pattern for my use case if possible, since it offers a better abstraction.

Internal phone memory error

I have recently deleted some files, some videos that I have deleted with a total size of 1.6 GB +, I delete it with Google photo, Suddenly, Google freezes photo and I saw that the video is gone, but the memory stays the same, with 15.6 Gb before and it should be around 14.0 Gb but it does not change. This problem has already occurred before I detected the problem. How do I delete the file or at least find it? I'm already trying Memory Cleaner app like CC, but it will not find any file I'm looking for. I use Nokia 5

magento 1.9 – new user can not be registered (ERROR 500 – internal server error!)

I am working on the live site tuxedosonline. it is in magento1. My problem is that as a guest user, I can click on a link, a category or something similar when I try to register a new user or sign in with an account and click on a link that shows me
Error 500 – internal server error!
If you receive this message repeatedly, please contact the webmaster.
I checked all my previously updated files. There is no new file on my server. I do not know how to remove them. Please lead me
Many Thanks