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OpenWRT - various useful commands

Published on 2020-05-24 Author admin

Various useful commands for OpenWRT/LEDE devices: Show ethernet switch information: swconfig list swconfig dev switch0 show Updating packages: opkg update opkg list-upgradable opkg list-upgradable | awk '{ print $1 }' | xargs opkg upgrade Installing OpenVPN (with Easy-RSA) software: opkg install openvpn-openssl opkg install openvpn-easy-rsa Installing DynamicDNS client (with HTTPS nad LuCI support): opkg install… Continue reading OpenWRT - various useful commands →

Set UTF-8 characters encoding in Ubuntu console

Published on 2020-05-23 Author admin

To set UTF-8 characters encoding in Ubuntu console put following line into /etc/environment file. LC_ALL="en_US.UTF-8" Then restart your console session.

Running SQL query on database inside Docker container running on remote host

Published on 2020-04-15 Author admin

Single line command to run SQL query on database inside Docker container running on remote host: ssh root@tinkerboard -C 'docker exec -i nextcloud-mariadb mysql -u nextcloud -p -e "SELECT * FROM oc_bruteforce_attempts;" nextcloud'

CentOS 8 and Fedora 32 - make DNS working for Docker containers

Published on 2020-04-01 Author admin

In CentOS 8 and Fedora 32, by default DNS requests from Docker containers are being blocked by Firewalld. To make DNS working for Docker containers use below command (assuming that containers are using docker0 interface for networking): sudo firewall-cmd --zone=trusted --add-interface=docker0 --permanent sudo firewall-cmd --zone=trusted --add-interface=docker0

Verify SSH host public key fingerprint

Published on 2020-03-11 Author admin

To check SSH host public key (Ed25519 key, MD5 checksum): ssh-keygen -l -E md5 -f /etc/ssh/ssh_host_ed25519_key.pub