curl https: packages.gitlab.com g. 2 > dev null | sudo apt-key add-& > dev null I don t know what this statement means. There are numbers > null & >-what all these stand for ...

https: blog.csdn.net baidu_3. I can configure domain according to his settings, but I want him to change it into a subdomain name such as xxx.ccc.com . How can I set it? do you want to transfer the domain name to the same IP? ServerName...

downloaded the btcpool source code, want to run on ubuntu16.04, but compiled ~! is there really a problem with the source code? Has anyone ever encountered this problem? who has the experience of successfully compiling btcpool source code? PPPPPP...

I found it like this update-alternatives --set php usr bin php7.2 the original version is 7. 0 installed. I want to cut the past , but I found that etc php 7.2 is also available here. which is the right way? what else should we pay attention to?! ...

this is something in chrome after I turned on debug mode on my phone. Now I want to debug version 53 of webview, instead of using chrome to open the web page to see the effect. I want to know if there are any js errors in the web page. ...

ubuntu apt-get is always wrong sudo apt-get update After update, the following appears: hash sum mismatch soft execution: sudo rm -fR var lib apt lists * sudo apt-get clean sudo apt-get update --fix-missing still appears, hash sum mismatc...

about vmware virtual machine installation ubuntu and centos cannot be started, restart many times, VMware prompts this host to support Intel VT-x, but Intel VT-x is disabled each time. I use Huawei desktop computer, I enter the BIOS system, the display ...

curl -sL https: deb.nodesource.com setup_6.x | sudo -E bash - What does the command mean? what does the L in the parameter, setup_6.x in url, |, sudo-E bash-all mean. ...

< H2 > 1. Run the test program run_simulator < H2 > after compiling the btcpool source code, run its test program cd work btcpool build run_simulator . simulator -c simulator.cfg -l log_simulator this program does not live in hang, so it is "finis...

as shown in the figure: I want to refresh the magento, as well as foreground compilation and background compilation, all prompt me for errors. I tried to find the answer on the Internet. I was prompted to give permission on the Internet, but I still ...

The server has been installed lrzsz . Now, if you want to upload a file to the server in ubuntu16.04, what kind of client do you need to install? Thank you ...

ubuntu-12.04, uses usb network card rtl8192eu, installed linux driver installed hostapd, and configured hostapd.conf wifi to connect normally in sta mode. but use hostapd to do wifi hotspots, and convert them to AP, prompts that nl80211 is missing ...

I compiled the source code for bitcoin and btcpool respectively. When running some services in btcpool, I need to set up the RPC service. this RPC service should be provided by bitcoind. now I need to set the address of the RPC service is 127.0.0.1 ...

this is a backup script -sharp! bin bash docker_name=mysql_container data_dir= home ubuntu mysql_dump usr bin docker exec -it $docker_name usr bin mysqldump -u root -p root --all-databases > "$data_dir data_`date +%Y%m%d`.sql" A file wi...

service does not have an iptables service, what do you think of the status of iptables? What about shutting it down? ...

install Ubuntu16.04 on a removable hard disk, no matter how you use it under window, but you can t read it by pressing option to boot under Mac. I installed Ubuntu16.04-desktop on a 500g removable hard drive. the installation method was originally...

Local ubuntu16.04 compiles btcpool source code, and after completion, there is an error running its test program simulator 1. Run the sserver program first cd work btcpool build run_sserver . sserver -c sserver.cfg -l log_sserver 2. Run simulator ...

after using the normal shutdown yesterday, my younger brother s ubuntu restarted to enter the interface and found that the top status bar disappeared, the left menu bar of the system also disappeared, and the menu bar of the program also disappeared aft...

Why is typesetting always messy when using SQLserver s sqlcmd to execute select on ubuntu? the following figure shows the effect after sp_help student has been executed. select * from sys.tables is the same ...

after compiling the btcpool source code, there is a problem running each module (not managing it with supervisor for the time being, but starting the service separately) < H2 > bitcoind < H2 > bitcoind vi root .bitcoin bitcoin.conf run: . blkma...