Tech Rescue

Hector Perez

Disable root login and password authentication in Linux

Disable root login and password authentication in Linux

WARNING!: Before following the steps below, make sure you have either physical access to the machine or you have setup access via SSH Private/Public Key to that machine, otherwise you will be locked out! Disable root SSH login You need edit the sshd_config file to look for the

How to connect to a Wi-Fi network from Linux command line

How to connect to a Wi-Fi network from Linux command line

1. Scan the list of available Wi-Fi networks through all connected Wi-Fi devices: khadas@Khadas:~$ nmcli device wifi list IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY 00:33:22:AA:FF:77 DEFCON-338LM Infra 6 130 Mbit/s 100 ▂▄▆█ WPA1 WPA2 55:A1:78:14:FF:F1 NeighborsWiFi09

How to send SMS through GSM modem in Ubuntu

How to send SMS through GSM modem in Ubuntu

Equipment and specifications: * Khadas VIM4 (SKU: KVIM4-N-02) * Quectel EM06 4G LTE Module (SKU: K-LTE-002) (EM06-E - EMEA / APAC / Brazil) * New M2X Extension (SKU: KM2X-V-002) * 30W USB-C Adapter (SKU: KP30W-EU-002) (EU + USB-C Cable) * Free telecom SIM Card (EU) * Ubuntu 22.04.3 LTS jammy (installed via OOWOW) * gnokii 0.6.31

How to unlock SIM card from command line in Ubuntu

How to unlock SIM card from command line in Ubuntu

Equipment and specifications: * Khadas VIM4 (SKU: KVIM4-N-02) * Quectel EM06 4G LTE Module (SKU: K-LTE-002) (EM06-E - EMEA / APAC / Brazil) * New M2X Extension (SKU: KM2X-V-002) * 30W USB-C Adapter (SKU: KP30W-EU-002) (EU + USB-C Cable) * Free telecom SIM Card (EU) * Ubuntu 22.04.3 LTS jammy (installed via OOWOW) * mmcli 1.20.0

Configure static IP address in Fedora 39

Configure static IP address in Fedora 39

Here is how to configure a static IP address in Fedora 39.

How to hash files in MacOS terminal

How to hash files in MacOS terminal

Let's say that you have to check the sum of a file you just downloaded. The hash is SHA-256. You would run this command: shasum -a 256 file_name Output looks like this: bla@macos Downloads % shasum -a 256 kali-linux-2023.3-installer-netinst-amd64.iso 0b0f5560c21bcc1ee2b1fef2d8e21dca99cc6efa938a47108bbba63bec499779 kali-linux-2023.3-installer-netinst-amd64.iso If you ahve OpenSSL

How to install Z shell in Fedora 38

How to install Z shell in Fedora 38

To install: sudo dnf install zsh Output looks like this: Last metadata expiration check: 0:02:21 ago on Fri 29 Sep 2023 11:57:41 AM CEST. Dependencies resolved. ================================================================================================================================================================================================ Package Architecture Version