Someone's Second 🧠

    Network

    Network

    Intro

    Enable Disable Network

    Enabling Wifi adapter via Command Line on Debian based distros

    sudo ifconfig wlan0 up

    To disable

    sudo ifconfig wlan0 down

    IP Address Info

    To check up on network information

    ip addr

    Source

    Config

    All your network settings are located in etc/dhcpcd.conf
    Make sure if you want to edit the Ethernet interface or WLAN interface for Wireless.

    interface eth0
static ip_address=10.1.1.30/24
static routers=10.1.1.1
static domain_name_servers=10.1.1.1

    https://raspberrypi.stackexchange.com/questions/37920/how-do-i-set-up-networking-wifi-static-ip-address-on-raspbian-raspberry-pi-os/74428#74428

    https://raspberrypi.stackexchange.com/questions/110950/no-internet-via-ethernet-local-network-working

    https://www.reddit.com/r/raspberry_pi/comments/117eizu/raspberry_pi_4_connects_to_wlan0_but_refuses_to/

    FileZilla for connecting the FTP / SFTP server

    https://stackoverflow.com/questions/12687900/connection-attempt-failed-with-econnrefused-connection-refused-by-server

    Kill Switch

    Troubleshooting

    Internet Down

    So my raspberry pi internet was down partly because I have manually configured my nameserver in conf file.
    Location : /etc/resolv.conf

    # Generated by resolvconf
nameserver 192.168.0.1
nameserver 8.8.8.8
nameserver 192.168.0.88
nameserver 208.67.222.222

    Below is the post copied from Reddit comment
    Since you never know which subreddit or internet goes offline, deleted post etc.

    A standard trick to differentiate between a low-level network problem and a DNS issue is to ping 8.8.8.8 which is google’s DNS server.

    • If you can ping 8.8.8.8 successfully, then your network is good but your DNS is hosed. Look at /etc/resolv.conf and check the name server setting.

    • If you can’t ping google DNS, then try pinging your router. This is often 192.168.0.1 but check another computer connected to the same router for the correct address.

      • also run ‘ip a’ or ‘ifconfig’ to check the IP address assigned to wlan0

    • if you can’t ping your router, you probably have a Wi-Fi issue, or perhaps a DHCP server issue with your router (power cycling your router can sometimes solve).

    Post back what you find out