System administrator questions and answers

Answers on Windows, Apple, Android, Unix, Linux, Ubuntu, Raspberry Pi, elementary OS, software, hardware, network and other topics. Only useful solutions!

Ubuntu

Huawei Technologies Co., Ltd. E353/E3131 contains software intended to be automatically started. Wifi doesn't work

Suddenly for a reason I do not know, my USB wifi stopped working on Ubuntu but still works on Windows. I get this message when I plug it to Ubuntu laptop: “NamBe” contains software intended to be automatically started. Would you like to run it? If you don’t trust this ....

Benjamin Benjamin: Just now

Ubuntu

Unable to expand my partition

Im on gparted live with 50GB unallocated partition, but my linux partition can't be expanded.image ....

Paisley Paisley: 1 minute ago

Apple

How to disable the "this cable or accessory is not certified" message on iPhone?

The message "this cable or accessory is not certified and may not work reliably with this iPhone" pops up whenever I use a 3rd party USB cable for it. It's really annoying, because then I'd have to unplug it, then plug it in again for it to start charging (the ....

Scarlett Scarlett: 2 minutes ago

Unix & Linux

Question about global environment variables and fork() & exec()

What I'm trying to understand is where does a child process inherit exported variables from it's parent process What I'm trying to understand is where a child process inherits exported environment variables from? I understand the exec() system call overwrites environment variable created by the fork()... But how does exec() ....

Aubrey Aubrey: 3 minutes ago

Server

Openvpn linux connection reset, restarting [0]

This works perfectly fine under windows but fails on my ubuntu laptop Does anyone have any insight as to why this is? openvpn output Thu Dec 31 13:49:42 2015 OpenVPN 2.3.2 x86_64-pc-linux-gnu built on Apr 13 2015 Thu Dec 31 13:49:42 2015 WARNING: file 'tom.key' is group or others accessible ....

Gabriel Gabriel: 4 minutes ago

Ubuntu

How to recover partition when uninstalling wubi?

I have uninstalled wubi on my laptop, the problem is, my Hard Disk space wasn't restored. It went from 500gb to 250gb when I installed wubi, but when I uninstalled wubi/ubuntu, my hard disk space is still 250gb. So how do I recover the partition that I alloted upon installation ....

Ezra Ezra: 5 minutes ago

Windows

How to delete Rufus

I just downloaded Rufus. And no longer need it. I am looking to delete it completely off my computer. I go to controlpanel > Programs > Uninstall but it's not located in the programs menu. Any help? ....

James James: 6 minutes ago

Windows

Docker CE upgrade on Red Hat Enterprise Linux Server release 7.9 (Maipo)

Trying to install docker on linux machine, getting some strange error. when i install docker ce - dependency is docker-ce-rootless-extras​, when i install docker-ce-rootless-extras - dependency is docker-ce The error # rpm -ivh https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-20.10.0-3.el7.x86_64.rpm Retrieving https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-20.10.0-3.el7.x86_64.rpm warning: /var/tmp/rpm-tmp.8moqkE: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY error: Failed dependencies: docker-ce-rootless-extras ....

David David: 7 minutes ago

Ubuntu

ubuntu 14.04 xrdp grey

I installed the latest ubuntu desktop and when I install xrdp I get a grey screen when I connect from windows rdc. this works fine in ubuntu 12.04. I found several solutions but they are not really what I want. I would like for the ubuntu desktop to function with ....

Sofia Sofia: 8 minutes ago

Ubuntu

Change refresh rate on multimonitor

I was trying to use xrandr to set the refresh rate on a cheapo Korean IPS monitor that I'm running on displayport. It's supposed to be 60hz, or else the screen does a frequent tear / reset colour test. If you see below DP-1-1-2 is showing 59.95*+ but it should ....

Ariana Ariana: 9 minutes ago