Ubuntu: port 53 already in use. How to free the port 53?
Example error: when we ran custom DNS server and we got the error: Port 53 already in use. How to free the port 53? You…
Latest Topics
CentOS Nginx error: could not open error log file: open() “/usr/share/nginx/logs/error… denied
Check status of service nginx: systemctl status nginx.service and we see error: How to fix this error: Method 1: disable SELinux edit file /etc/selinux/config Change…
Ubuntu 20.04: install MongoDB Driver for Lua – part 2
Part 2 install specific version of lua-mongo Example we install version 1.1.0 Follow step 1 and 2 in part 1 : Ubuntu 20.04: install MongoDB…
Ubuntu 20.04: setup MongoDB Replica Set
Example we install MongoDB v5.0 We have 4 servers : 167.235.17.110 167.235.17.111 167.235.17.112 167.235.17.113 Install MongoDB v5.0 on each server Step 1*: sudo apt-get install…
How to convert DAA file to ISO file
Step 1: Run UltraISO. Step 2: Choose “Tools > Convert” Menu. Step 3: UltraISO shows Convert dialog. Choose the source DAA file you want to…
Windows: how to install sshpass
Use Cygwin
WebRTC error: RTCDataChannel send queue is full
How to fix error: RTCDataChannel send queue is full Original code: example: simple-peer Fixed code:
Get Facebook access token full permissions – 2022
Step 1. Open your browser like Google Chrome, Mozila Firefox Step 2. Open dev tools (F12) Step 3. Go to tab: console Step 4. Paste…
CentOS: install google chrome
Step 1: install dependencies : liberation-fonts vulkan-devel xdg-utils Step 2: install google chrome
Google OAuth2: Why don’t I get refresh token
Example google authorization url: We dont get refresh token: The refresh_token is only provided on the first authorization from the user. Subsequent authorizations, such as…