Linux basics
Basic commands
- ps -as
- View running processes
- ps -ef|egrep|[The process name you want to see]|[The process name you want to see]|・ ・ ・|grep -v grep
- systemctl status firewalld.service
- systemctl list-unit-files -t service
- See the operating status of all services
vim
- Search to move to the next hit
- "N" after searching with /
- Undo [u]
- Undo Undo Undo [Ctrl + r]
mysql
- Check the maximum number of simultaneous connections
show variables like 'max_connections';
error message support
- "daemon-reload" is for "loading changes made to the Unit file"
- https://arailab.info/2018-02-26/?p=4880