Ubuntu

Learn how to install and configure ubuntu linux

Show Hiddenfiles

Ctrl + H

Taking a screenshot

Hold shift + prtScr , mouse turns to a cross. Select the area to screenshot.
Image will be saved to pictures folder by default.To copy to Clipboard, use: Ctrl + Shift + PrtScn

Configure Wifi Network

Reference: netplan

  • Find the network interface : ip link show
  • Add config.yaml file in /etc/netplans
ubuntu@myberry:/etc/netplan$ cat config.yaml
network:
  version: 2
  renderer: networkd
  wifis:
    wlan0:
      dhcp4: no
      dhcp6: no
      addresses: [192.168.2.40/24]
      gateway4: 192.168.2.1
      nameservers:
              addresses: [8.8.8.8,192.168.2.1]
      access-points:
        "ACCESSPOINT_NAME":
          password: "PASSWORD"
  • Apply the configuration : sudo netplan apply
  • See the routing table : ip r
ubuntu@myberry:/etc/netplan$ ip r
default via 192.168.2.1 dev wlan0 proto static
192.168.2.0/24 dev wlan0 proto kernel scope link src 192.168.2.40

Settingup SSH service

If there is any issue starting ssh service, remove and install openssh packages.

sudo apt remove openssh-server openssh-client --purge \
&& sudo apt autoremove \
&& sudo apt autoclean \
&& sudo apt update \
&& sudo apt install openssh-server openssh-client

sudo systemctl enable ssh
sudo systemctl daemon-reload
sudo systemctl status ssh

ubuntu@myberry:/etc/netplan$ systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2020-07-04 19:44:17 UTC; 21min ago
       Docs: man:sshd(8)
             man:sshd_config(5)
   Main PID: 1880 (sshd)
      Tasks: 1 (limit: 9255)
     CGroup: /system.slice/ssh.service
             └─1880 sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups

Jul 04 19:44:17 myberry systemd[1]: Starting OpenBSD Secure Shell server...
Jul 04 19:44:17 myberry sshd[1880]: Server listening on 0.0.0.0 port 22.
Jul 04 19:44:17 myberry sshd[1880]: Server listening on :: port 22.
Jul 04 19:44:17 myberry systemd[1]: Started OpenBSD Secure Shell server.
Jul 04 19:47:28 myberry sshd[2195]: Accepted password for ubuntu from 192.168.2.13 port 36716 ssh2
Jul 04 19:47:28 myberry sshd[2195]: pam_unix(sshd:session): session opened for user ubuntu by (uid=0)

Last modified July 16, 2024: code refactored (add6d20)