[SOLVED] Add nic for creating a subset, dns cannot works，networkmanager priority

sudo mv /etc/resolv.conf /etc/resolve.conf_orig

sudo ln -s /run/resolvconf/resolv.conf /etc/

 

cf: http://linux.vbird.org/linux_server/0230router.php

 

The solution for me is to set the network interface priority by setting the metric. 

Edit 網路連線 -> 有線連線2 -> IPv4 -> 路由(R)…，設定度量(Metric)為 99999 :

route -n shows:

chiao@kpchiao9600k:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.50.1    0.0.0.0         UG    101    0        0 eno1
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 enp3s0
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 enp3s0
192.168.0.0     192.168.0.1     255.255.255.0   UG    99999  0        0 enp3s0
192.168.50.0    0.0.0.0         255.255.255.0   U     101    0        0 eno1
192.168.51.0    0.0.0.0         255.255.255.0   U     0      0        0 vmnet1
192.168.188.0   0.0.0.0         255.255.255.0   U     0      0        0 vmnet8

ubuntu 18.04 /usr/lib/grub/i386-pc/modinfo.sh doesn't exist

I suspect this is caused by the wrong grub-install. So I do this:

apt purge grub-efi

apt purge grub2-common

 

Make sure grub-instal not exist:

ls  /usr/sbin/grub-instal

bash: /usr/sbin/grub-install: 沒有此一檔案或目錄

drupal error: Type Error: Argument 1 passed to Symfony\Component\HttpFoundation\ParameterBag::replace() must be of the type array,

 https://www.drupal.org/forum/support/installing-drupal/2020-12-06/unable-to-start-drupal-9-webpage-on-server

1. Open settings.php (/sites/default/settings.php) in any plain text editor. Add this line to the end of the file and save it:

   $settings['rebuild_access'] = TRUE;

2. Visit http://www.example.com/core/rebuild.php in your browser (where www.example.com is your site’s URL). After a short pause, you should be redirected to the home page of your site, and the cache should be rebuilt.
3. Open settings.php (/sites/default/settings.php) in a text editor. Find the line you added with $settings[rebuild_access], remove this line, and save the file.

 

Import sql error utf8mb4_0900_ai_ci

 https://pixelthis.gr/content/1273-unknown-collation-utf8mb40900aici

sed -i '' 's/utf8mb4_0900_ai_ci/utf8mb4_unicode_ci/g' db.sql 

System Dynamics

cf: /home/chiao/Fuzzy/Literature/SystemDynamics/15-988-fall-1998-spring-1999/contents/readings/teachers.pdf

 

  The level is an accumulation, or integration, or stock, to choose terminology from different fields. The rate is a flow that changes the amount in the level. The rate is defined by a “policy” statement that tells how the rate is controlled by the value of the level in comparison to a goal. All systems, everywhere, consist of these two kinds of concepts --levels and rates--and none other. 

 

Water in a bathtub is a level, the flow of water is the rate that changes the level. A person’s reputation is a level that is changed by the flow of good and bad actions by that person. The degree of frustration in a group is a level that gradually changes in response to surrounding pressures. 

At the point where a rate of flow is being determined, the condition of the system, as indicated by the values of the levels, is compared with a goal to determine control of the flow.  

 

https://en.wikipedia.org/wiki/System_dynamics 

 

A stock is the term for any entity that accumulates or depletes over time. A flow is the rate of change in a stock.