adb push error caused by illegal character in file name on Android.

Update modification time of photo/video according to EXIF data using command line.

Find images with specific dimension using Linux command line.

Copy files to Android smart phone without losing timestamps.

Build an offline copy of a website made by Pelican static site generator.

Pass command-line arguments to make and then pass then arguments to Go program in Makefile.

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

List .go source files excluding _test.go files via find and grep command in bash.

List folder size in descending and ascending order via du and sort command in bash.

Check if a program (or command), such as wget or ffmpeg, is available in Go.

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

Use Go standard os/exec package to run wget via shell command.

Disable caching in Go test.

Check if Makefile runs on Travis CI or not.

Example of Makefile rules for Go linters.

Pass command line arguments (flags) in Go test.

Create gh-pages branch and publish your static website to GitHub Pages in Makefile.

Replace specific pattern of strings in HTML files under directory via sed.

Replace specific pattern of strings in HTML files under directory via sed.

Get prefix or suffix of a string in Makefile.

Concatenate and minify JavaScript files via Makefile, curl, and online Google Closure Compiler.

Concatenate and minify JavaScript files via Bash script, curl, and online Google Closure Compiler.

Publish your static website to GitHub project pages via ghp-import in Makefile.

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

How to parse command-line arguments (string variable) via flag package in Go programming language.

Copy large number of files efficiently via Bash script on Linux.

Find redundant files saved by Chrome browser via Bash script.

Find redundant files saved by Chrome browser via Go.

Use find command to find all files with specific name and delete them in one line of command.

Use find command to find all HTML files in a directory, but exclude the HTML files in some sub-directory.

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

Convert HTML files in directory to PDF recursively via wkhtmltopdf and Bash script.

Remove execute(x) permission of files in directory recursively via chmod command and Bash script.

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.

Move large number of files via tar command under Bash. This is much quicker than mv command if there are a lot of small files.

Convert the format (Big5 encoding to UTF-8, remove DOS newline in file, replace string big5 with UTF-8, and append UNIX newline to end of file) of HTML files in directory via Bash script.

Convert the name of files in directory to lowercase via Bash script.

Read Yes/No (i.e., ask for user confirmation) from console in Go programming language.

Convert encoding of file from Big5 to UTF-8, remove DOS newline in file, replace string big5 with UTF-8, and append UNIX newline to end of file.

Extract text (i.e., footnote) in HTML via state machine and goquery in Go programming language.

Iterate over all DOM elements in HTML via Go programming language. Use net/html package to parse and iterate all elements in HTML. Search for HTML links and output them in reStructuredText format.

Example for how to replace a string in a variable in Makefile.

Make reStructuredText links of the same name anonymous via regular expression by sed stream editor.

Replace footnote in reStructuredText format via regular expression by sed stream editor.

A simple example to read HTML title via goquery in Go.

Makefile's notdir = Python basename / Go path.Base.

Convert file encoding from Big5 to UTF-8 via Go programming language.

Insert a line after first pattern match via sed stream editor.

Download and save HTML file from given URL via Go. Do nothing if the HTML file already locally exists.

Convert all files in a directory recursively (i.e., including subdirectories of the directory) from Big5 encoding to UTF-8 via iconv command.

Append text at the beginning of each line via sed stream editor.

Convert Traditional Chinese PO file to Simplified Chinese via OpenCC and sed in Makefile.

Concatenate and Minify CSS via sed and tr command in Makefile.

Concatenate and compress JavaScript files via Go programming language and online Google Closure Compiler.

Concatenate JavaScript files via Go programming language.

Makefile - Create symbolic link if it does not exist. Otherwise do nothing.

Find redundant files saved by Chrome browser via Python.

Online concatenate and compress JavaScript files via Python script.

Concatenate JavaScript files via Python script.

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

mkdir -p command in Go

mkdir -p command in Python

echo colorful output in Makefile.

Makefile - Create a directory if it does not exist. Otherwise do nothing.

Example of how to use serve and build command of GopherJS.

Write a bash script to use wget to fetch webpages.

How to pass command-line arguments (flags) in Go programming language.

List all files in a directory recursively (i.e., including subdirectories of the directory), and use sed to rename the files.