22.04 LTS, 23.10
The other day I noticed some changes in the top right collection of icons. I only have 2. I could not turn on my VPN network, had no sound (loudspeaker), and it downed upon me I had no access to the internet. And I think some software was deleted. In the recent past my system complained it only had 650 MB (?) space left. Now I have 1,7 G space left.
I checked to system using stats the Dradcula Server website (draculaserver.com/tutorial/how-to-troubleshoot-common-network-issues-in-ubuntu/):
Check network adapter:
me@mysystem:~$ sudo lshw -C network
*-network UNCLAIMED
description: Ethernet controller
product: RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:27:00.0
version: 15
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix cap_list
configuration: latency=0
resources: ioport:d000(size=256) memory:fc604000-fc604fff memory:fc600000-fc603fff
Certify network settings:
me@mysystem:~$ ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
Restart Network services:
me@mysystem:~$ sudo systemctl restart NetworkManager
me@mysystem:~$
Check DNS settings:
4. Check DNS settings:
me@mysystem:~$ cat /etc/resolv.conf
# This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8).
# Do not edit.
#
# This file might be symlinked as /etc/resolv.conf. If you're looking at
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.
nameserver 127.0.0.53
options edns0 trust-ad
search .
Test DNS:
me@mysystem:~$ nslookup example.com
;; Got SERVFAIL reply from 127.0.0.53
Server: 127.0.0.53
Address: 127.0.0.53#53
** server can't find example.com: SERVFAIL
I also tried to access my router,. I have the IP address in my password manager, but FireFox told me It could not connect to the server at the address of the router. Wifi and Bluetooth are not working either.
When I came to Discord to log this complaint yesterday I saw some actions I found on this site. I downloaded wireless_info.txt and the next day copied it to my Desktop. But when I ran it nothing seems to happen, except the contents of the file was overwritten with something like:
######### Wireless info ########