I have three centos servers. Through the shell script, I want A to execute a .sh script in C and B to execute a script, and then send their generated files to C after An and B have finished executing. Because the compilation and execution time is very l...
operating system: windows server2008 R2 uses virtualbox5.12 accidentally delete vdi files, snapshots are still there, how to restore ...
question 1: subtitle of p33 page in the book: leave spaces and line breaks by quoting sub-shell. there are three lines in text.txt, with one number per line, such as 1 2 3 1 2 3 using out=$ (cat text.txt) echo $out to lose line feeds, and using t...
python * * py & is this how I run, or is it disconnected? ...
1. Recently, I encountered a strange thing when I configured adsl dialing on linux. When adding vlan to linux, the VLAN Dev name of vlan normally ends with [network card .xx]. As a result, mine ends with [renamexx], which is directly above the figure. ...
when you ask this question, you usually give the answer to these questions 1, how the nginx server removes the index.php in url 2, how the nginx server URL cannot automatically add index.php 3, and how nginx hides the index.php or .php path . what I...
Job for vsftpd.service failed because the control process exited with error code. See "systemctl status vsftpd.service " and "journalctl-xe " for details. this is my configuration anonymous_enable=YES local_enable=YES write_enable=YES local_um...
for work reasons, I used the strace command to track the whole process of curl and wget requests, and the conclusion about DNS domain name resolution is as follows. Some of them do not understand, and the source code does not understand (operation and m...
at present, I have a website with both static and dynamic interfaces. I wonder if I can build a tomcat cluster on a server and then use nginx to configure load balancers. Can I increase the number of concurrency of this website? Server environment: gene...
problem description look at the server system resources and find that 80% of the memory has been eaten by a process, and then navigated to a PHP process. so how can I continue to locate and find the code location, or the file? ...
main server jps shows DataNodeDataNode jps: dead nodes is displayed as 0 ...
the time is as follows: every day 08 30,10 code 10, 10:40 < time > how to write it out with one command? can you write multiple arbitrary time points, for example: 2018-12-03 14 purge 09, 2019-03-22 15:17 ...
I originally wanted to configure https, and there was a problem, but now I can t access it by http. It automatically becomes https, every time. refer to an in-site article when configuring: https: codeshelper.com a 11. ip access is normal, but I wa...
in Linux, when using the shutdown command, it is often used to shut down the system: shutdown -h (Linux) shutdown -r then why is it rare to see: shutdown -hr am I ill-informed? so let s just say: shutdown -r ...
Why is this problem? ping is not available (ping one of Baidu s ip) $ ping 220.181.57.216 PING 220.181.57.216 (220.181.57.216) 56(84) bytes of data. --- 220.181.57.216 ping statistics --- 80 packets transmitted, 0 received, 100% packet loss, time 78...
want to understand a problem, that is, the principle of domain name resolution, is there any easy-to-understand explanation? for example, when I use PHPstudy to develop a website, I don t have a DNS service locally, but after configuring a virtual ho...
A stand-alone server for fastdfs has been built in the internal network, and ip, is mapped through the public network to be accessed by the external network. When the fastdfs of the internal network uploads new images to the server, the public network ca...
novices under nginx see that there are many things similar to variables and constants in the configuration items, such as like $url,$document_root of variables, like QUERY_STRING of constants, and where should I print their values? another ques...
two computers, pc1 pc2. pc1 push project1 to https: xxxx@github.com xxxx . git init git add project1 git commit -m "from pc1" git remote add origin ttps: xxxx@github.com xxxx yyyy.git git push -u origin master succeeded. now you ...
relative imports start with ,. , or.. . Here are some examples: import Entry from ". components Entry "; import {DefaultHeaders} from ".. constants http "; import " mod "; all other forms of import are treated as non-relative. Here ...
1. When vue-router does nested routing, you can already receive the value when you jump to the product page, but I want to jump to the default ProA. After redirect redirection, I can jump to the ProA page, but product can t get the value passed, for ex...
I built a linux virtual machine locally, and then deployed the wordpress project. Why? when I visited the project locally, I prompted that the database link failed, and then I changed the localhost of the DB_HOST configured in the database to the IP of l...