VNSGU TYBCA Sem 5: Three Shell Script Methods to Count Vowels and Convert Case

A technical guide published on DEV Community addresses VNSGU TYBCA Semester 5 Linux practical Set B, demonstrating how to count vowels and convert string case using shell scripting. Three distinct approaches are covered: a Bash for-loop with a case statement, the tr command combined with wc, and grep with wc. Each method achieves the same results — counting vowels and producing uppercase or lowercase output — but varies in complexity and the Linux tools involved. The for-loop and case approach is highlighted as the most suitable for exam settings where demonstrating core scripting logic is expected. The guide also notes that Bash parameter expansion features like the double-caret and double-comma operators may not work in older shell environments.