scene: Raspberry pie 3B+ camera is official: , , , , : mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x16b90b0 (ENOSPC) mmal: mma...
problem encountered: docker and qemu virtual machines are deployed on the same machine. Docker containers and virtual machines are not in the same network segment, and both containers and virtual machines are connected to the host through bridge. Host ...
there is a problem. When using openvpn to connect to the company s intranet, local traffic will go through this vpn globally, so that other traffic will slow down . so how can it be set locally to make openvpn local (specify the access domain name or ...
I installed a virtual machine on python. There is a script usually: source ~ env bin activate () python text.py but it s troublesome every time. I want to write a shell or python, but I can t use source in shell and python. According to what...
vitualbox one host and two virtual machines can both use nat mode to communicate. The Ip address dynamically learned by both virtual machines is 10.0.2.15 addresses! ...
I am a complete novice to Linux. has a 20G droplet on Digital Ocean. There is only a small personal blog site on it, so I never worried about running out of 20GB hard drives. tried to deploy a second small website inside yesterday, upgraded the Ubuntu...
can Linux set whitelist according to specific port: 80 port setting 1.1.1.1 can be accessed, 88 port setting 2.2.2.2 can access this? ...
1. Problem: distinguish between redhat and centos to get release number (such as centos6.5 "6.5 ", redhat " 7.3 ") 2. I tried to write a command: lsb_release-a | grep Release | awk {print $2} | awk-F. {print $1 ". " $2} but only for centos6...
Host: Ali Cloud ECS Environment: CentOS 7.6 neither reverse proxy nor redirection succeeded PS: found that even the default welcome page cannot be accessed. default.conf is configured as follows: server { listen 80; ...
how to change 127.0.0.1 to 0.0.0.0 as shown in the figure ...
weak to ask you prawns, 1. Is the kernel compiled after downloading from the kernel website preemptive or non-preemptive? 2. If it is preemptive, how to compile non-preemptive? If it is non-preemptive, how to compile it? 3. By patching? Where can I do...
Why does CPU multitask time-sharing execution? CPU wastes a lot of time in context switching. It feels like one is not finished and the other is fast ....
Doesn t the command yum install glibc.i686 require a yum source? ...
the environmental background of the problems and what methods you have tried in laravel framework, linux environment, xshell executes crontab scheduled tasks, they said that the root directory of the executed project is the absolute path, which I...
the search string is highlighted when using the grep command. But sometimes there are too many search results, so if you need to page them, you should use less . grep "find string " file |less the search string is not highlighted in the less results ...
< H2 > the cause of the problem < H2 > recently wrote a scheduled task using quartz . This scheduled task is mainly to add something like points to members, and to keep a record of points increase, which is executed at 4 o clock every morning, but s...
read a lot of articles, saying that I have tried another ssh2 package. I have tested the ssh2 package ssh2-1.1.2.tgz ssh2-0.12.tgz ssh2-0.13.tgz . also depends on libssh2 libssh2-1.8.0.tar.gz libssh2-1.4.2.tar.gz have all been tested, and an...
I wanted to use Ali s oss, but I found that many configurations of Ali s picture system could not be personalized, and the url form could not be personalized, so I decided to build my own picture server? my server is centos7+php7+nginx with the fol...
I would like to ask why memory ic10 address pins can specify 1024 different addresses. People on the Internet say that the tenth power of 2 equals 1024. the question I want to ask is, isn t there only 10 physical address pins? How to store so many 1024...
problem description found that their own ECS environment, linux Chinese can not be displayed properly, but also installed a Chinese language pack! the platform version of the problem and what methods you have tried system version number what...
get the add source first yum php7 163yum yum ...
now I want to use web to achieve the effect of the above image. I found that using the following code directly is to jump to the image interface of the system directly. I don t know if I can achieve the effect on the way. <input type="file&...
after each release of the web project, the test clears the browser before updating the modified part. How to solve the problem ...
study the functional components of vuejs: official website link: functional components in version 2.5.0 and above, if you use a single file component, a template-based functional component can declare < template functional > < template > bu...
suddenly encountered a thorny problem. . . suppose there is a xxx.com blog I am using htaccess to rewrite RewriteRule ^ blog$ src blog.php and then I think of a question: suppose I want to set a subdomain name? I want him to read the php file in ...