Cant install apk, remove apk and install apk again, it fails

I have an issue that Im a bit curios about. When I do the following with an unsigned APK it wont install. Use case:

  1. Download APK
  2. Open APK
  3. Allow unknown sources in google play protect
  4. Open app
  5. Uninstall app
  6. Open the same APK
  7. Allow unknown sources

Expected: app installs successfully Actual: installation of the app starts, runs for a few seconds and then it stops it with the message “cannot install app”.

Does anybody know why this happens? What is the check that forbids this use case?

Thank you in advance!

2 different ids for apple music and netflix, can’t update

I have 2 different ids working on my phone, the old one have subscription of 50Gb cloud data + netflix and the new one have apple music, please note both netflix and apple music are family subscirptions from my account hence 5 other members also have some data in their account, and i don’t want to get rid of anything from my account (Downloaded songs from apple music). Please help

Can’t ping eth1 via eth0

I have two virtual machines with CentOS 7 installed. Each VM has two NICs and two IP addresses.

ip configuration of VM1:

eth0: eth1: 

route of VM1: dev eth1 proto kernel scope link src metric 101 dev eth0 proto kernel scope link src metric 100 

ip configuration of VM2:

eth0: eth1: 

route of VM2: dev eth1 proto kernel scope link src metric 101 dev eth0 proto kernel scope link src metric 100 

I can ping from VM1(, to and can ping from VM2(, to

The problem is, I want to ping from VM1(, to, so I add a route in VM1

ip route via 

so the route of VM1 is: via dev eth0 dev eth1 proto kernel scope link src metric 101 dev eth0 proto kernel scope link src metric 100 

But I still can’t ping from VM1 to

So, where am I wrong?

By the way, I have disabled SELinux and firewalld on all my machines.

Can’t resize partition

My Disk Utility is showing me some Weird Stuff.

My current startup partition is showing as 155 GB, with (I was shocked to discover) 344 GB of unpartitioned free space:

enter image description here

I can try to resize the first partition by removing the “Free space” section, then hit “Apply”, but then I get this error:

enter image description here

Actually, if I try this a few times, I get variously different errors. Sometimes it even says it succeeds, but the partition size doesn’t seem to have changed.

When I retry this same sequence after booting from my recovery partition, basically the same result happens, except that now I have two “Free space” partitions, both showing 344 GB, in addition to the 155 GB startup partition.

What’s going on here, and how can I take advantage of my full 500 GB disk? Or do I not actually have a 500 GB disk??

Here’s the Disk Utility info for the physical disk – notice that it says it’s 500 GB, but the 155 GB partition takes up the whole blue bar:

enter image description here

I’m using High Sierra 10.13.6, on a Late 2011 MacBook Pro 13″.

Why can’t I release memory cache by /proc/sys/vm/drop_caches

Today I found my server only have few free memory. and I executed free -h, it shows there are 60G memory used by cache. So I execute command to release cache, the result like this:

$   free -h; sudo sync; echo 3 > sudo /proc/sys/vm/drop_caches; free -h              total       used       free     shared    buffers     cached Mem:          126G       114G        11G       5.6M       465M        60G -/+ buffers/cache:        53G        72G Swap:          75G       607M        74G              total       used       free     shared    buffers     cached Mem:          126G       114G        11G       5.6M       465M        60G -/+ buffers/cache:        53G        72G Swap:          75G       607M        74G 

It seemes didm’t release any cache at all, and this server doesn’t have virtual machine on it. Why? What should I do to release cache except reboot server(My OS is Debian 8)?
Thank you!

Can’t open or quit Finder

I’m trying to open Finder, but every time I try I get this error message:

enter image description here

I’ve tried restarting my Macbook Pro as well as doing a “Relaunch” from “Force Quit Applications”:

enter image description here

However, nothing happens when I try to force-quit the application, so I’m ‘stuck’ with a non-responsive Finder. How can I fix this?

The Ubuntu filesystem became read-only and I can’t boot into it anymore

This has occurred twice now, in Ubuntu 18.04 and Ubuntu 19.04, I ran both alongside windows 10 on Dual Boot.

I had Ubuntu 18.04, I was moving data to my external hard drive and a file couldn’t be moved, when I cancelled it I noticed that all my folders on Ubuntu have become read-only, I change the permissions of my home folder and it was fixed. But after a reboot, I couldn’t boot into Ubuntu anymore. It was in the bios but I got an error while booting into it.

I used a live boot on usb with Ubuntu 19.04 and tried to fix it (I was told the reason might be an update from windows or because of fast startup so I stopped both, but it happened again) and it didn’t work so I just installed Ubuntu 19.04 instead since I was told the reason might be that my system is corrupt.

And now after a day of using Ubuntu 19.04, the same problem has occurred again, what can I do to fix it? I thought about formatting my external hard drive, but if that fails I’d lose all my data for no reason, so I thought I should ask first.

Got this error while trying to launch Docker Quick Start Terminal on Mac. I can’t seem to understand the error

Traceback (most recent call last):   File "/anaconda3/lib/python3.7/site-packages/conda/cli/", line 138, in main     return activator_main()   File "/anaconda3/lib/python3.7/site-packages/conda/", line 955, in main     print(activator.execute(), end='')   File "/anaconda3/lib/python3.7/site-packages/conda/", line 180, in execute     return getattr(self, self.command)()   File "/anaconda3/lib/python3.7/site-packages/conda/", line 154, in activate     builder_result = self.build_activate(self.env_name_or_prefix)   File "/anaconda3/lib/python3.7/site-packages/conda/", line 285, in build_activate     return self._build_activate_stack(env_name_or_prefix, False)   File "/anaconda3/lib/python3.7/site-packages/conda/", line 307, in _build_activate_stack     return self.build_reactivate()   File "/anaconda3/lib/python3.7/site-packages/conda/", line 452, in build_reactivate     new_path = self.pathsep_join(self._replace_prefix_in_path(conda_prefix, conda_prefix))   File "/anaconda3/lib/python3.7/site-packages/conda/", line 569, in _replace_prefix_in_path     if path_list[last_idx + 1] == library_bin_dir: IndexError: list index out of range 

$ /anaconda3/bin/conda shell.posix activate base

environment variables: CIO_TEST= CONDA_BACKUP_HOST=x86_64-apple-darwin13.4.0 CONDA_BUILD_SYSROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk CONDA_DEFAULT_ENV=base CONDA_EXE=/anaconda3/bin/conda CONDA_PREFIX=/anaconda3 CONDA_PROMPT_MODIFIER=(base) CONDA_PYTHON_EXE=/anaconda3/bin/python CONDA_ROOT=/anaconda3 CONDA_SHLVL=1 DOCKER_CERT_PATH=/Users/Ronnit/.docker/machine/machines/default NO_PROXY= PATH=/anaconda3/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/anaconda3 /bin REQUESTS_CA_BUNDLE= SSL_CERT_FILE=

 active environment : base active env location : /anaconda3         shell level : 1    user config file : /Users/Ronnit/.condarc 

populated config files : /Users/Ronnit/.condarc conda version : 4.6.14 conda-build version : 3.17.8 python version : base environment : /anaconda3 (writable) channel URLs : package cache : /anaconda3/pkgs /Users/Ronnit/.conda/pkgs envs directories : /anaconda3/envs /Users/Ronnit/.conda/envs platform : osx-64 user-agent : conda/4.6.14 requests/2.21.0 CPython/3.7.3 Darwin/18.5.0 OSX/10.14.4 UID:GID : 501:20 netrc file : None offline mode : False

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