Upgrade from Ubuntu Linux 17.10 to 18.04 and disk space runs out quickly. And how I fix this issue.

Use ffmpeg to merge Instagram video and audio of live replay shared to stories.

Get prefix or suffix of a string in Makefile.

Given an installed package name on Ubuntu Linux, find its version in Makefile.

Run wkhtmltopdf on Travis CI, which convert HTML files with chinese characters to PDF.

Example of copy local files to remote machine which allows only SSH key login via rsync command.

Upgrade from AWS EC2 t1.micro running Ubuntu 12.04 LTS with Apache-2.2 to t2.nano running Ubuntu 14.04 LTS with Apache-2.4.

Create or migrate user account with SSH login only (no password login) on AWS EC2 t2.nano with Ubuntu 14.04 LTS.

Write a bash script to convert wav to mp3 via ffmpeg on Ubuntu Linux 15.10.

Type romanized Pāli on your Ubuntu Linux.